Sending E-mail using C

Question

I need to send email via my C  app   I come from a VB 6 background and had a lot of bad experiences with the MAPI control  First of all  MAPI did not support HTML emails and second  all the emails were sent to my default mail outbox  So I still needed to click on send receive   If I needed to send bulk html bodied emails  100 - 200   what would be the best way to do this in C    Thanks in advance

User · Answer

Use the namespace System Net Mail   Here is a link to the MSDN page  You can send emails using SmtpClient class   I paraphrased the code sample  so checkout MSDNfor details   MailMessage message   new MailMessage      fromemail contoso com       toemail contoso com       Subject goes here       Body goes here     SmtpClient client   new SmtpClient server   client Send message     The best way to send many emails would be to put something like this in forloop and send away

User · Answer

The  NET framework has some built-in classes which allows you to send e-mail via your app   You should take a look in the System Net Mail namespace  where you ll find the MailMessage and SmtpClient classes  You can set the BodyFormat of the MailMessage class to MailFormat Html   It could also be helpfull if you make use of the AlternateViews property of the MailMessage class  so that you can provide a plain-text version of your mail  so that it can be read by clients that do not support HTML   http   msdn microsoft com en-us library system net mail mailmessage alternateviews aspx

User · Answer

Take a  look at the FluentEmail library  I ve blogged about it here  You have a nice and fluent api for your needs   Email FromDefault     To  you domain com     Subject  New order has arrived      Body  The order details are          Send

User · Answer

Let s make something as a full solution     Maybe it can help as well  It is a solution for sending one email content and one attach file  or without attach  to many Email addresses  Of course sending just one email is possibility as well  Result is List object with data what is OK and what is not   namespace SmtpSendingEmialMessage        public class EmailSetupData               public string EmailFrom   get  set            public string EmailUserName   get  set            public string EmailPassword   get  set            public string EmailSmtpServerName   get  set            public int EmailSmtpPortNumber   get  set            public Boolean SSLActive   get  set      false             public class SendingResultData               public string SendingEmailAddress   get  set            public string SendingEmailSubject   get  set            public DateTime SendingDateTime   get  set            public Boolean SendingEmailSuccess   get  set            public string SendingEmailMessage   get  set              public class OneRecData               public string RecEmailAddress   get  set                  public string RecEmailSubject   get  set                      public class SendingProcess               public string EmailCommonSubjectOptional   get  set                  private EmailSetupData EmailSetupParam   get  set            private List lt OneRecData gt  RecDataList   get  set            private string EmailBodyContent   get  set            private Boolean IsEmailBodyHtml   get  set            private string EmailAttachFilePath   get  set             public SendingProcess List lt OneRecData gt  MyRecDataList  String MyEmailTextContent  String MyEmailAttachFilePath  EmailSetupData MyEmailSetupParam  Boolean EmailBodyHtml                        RecDataList   MyRecDataList              EmailBodyContent   MyEmailTextContent              EmailAttachFilePath   MyEmailAttachFilePath              EmailSetupParam   MyEmailSetupParam              IsEmailBodyHtml   EmailBodyHtml                     public List lt SendingResultData gt  SendAll                         List lt SendingResultData gt  MyResList   new List lt SendingResultData gt                 foreach  var js in RecDataList                                using  System Net Mail MailMessage MyMes   new System Net Mail MailMessage                                          DateTime SadaJe   DateTime Now                      Boolean IsOK   true                      String MySendingResultMessage    Sending OK                        String MessageSubject   EmailCommonSubjectOptional                      if  MessageSubject                                                      MessageSubject   js RecEmailSubject                                             try                                                System Net Mail MailAddress MySenderAdd   new System Net Mail MailAddress js RecEmailAddress                           MyMes To Add MySenderAdd                           MyMes Subject   MessageSubject                          MyMes Body   EmailBodyContent                          MyMes Sender   new System Net Mail MailAddress EmailSetupParam EmailFrom                           MyMes ReplyToList Add MySenderAdd                           MyMes IsBodyHtml   IsEmailBodyHtml                                             catch Exception ex                                                IsOK   false                          MySendingResultMessage   Sender or receiver Email address error      ex Message                                             if  IsOK    true                                                try                                                       if  EmailAttachFilePath    null                                                                if  EmailAttachFilePath Length  gt  5                                                                        MyMes Attachments Add new System Net Mail Attachment EmailAttachFilePath                                                                                                                      catch  Exception ex                                                        IsOK   false                              MySendingResultMessage   Emial attach error       ex Message                                                     if  IsOK    true                                                        using  System Net Mail SmtpClient MyCl   new System Net Mail SmtpClient                                                                  MyCl EnableSsl   EmailSetupParam SSLActive                                  MyCl Host   EmailSetupParam EmailSmtpServerName                                  MyCl Port   EmailSetupParam EmailSmtpPortNumber                                  try                                                                       MyCl Credentials   new System Net NetworkCredential EmailSetupParam EmailUserName  EmailSetupParam EmailPassword                                                                     catch  Exception ex                                                                        IsOK   false                                      MySendingResultMessage    Emial credential error      ex Message                                                                     if  IsOK    true                                                                        try                                                                               MyCl Send MyMes                                                                             catch  Exception ex                                                                                IsOK   false                                          MySendingResultMessage    Emial sending error      ex Message                                                                                                                                                                             MyResList Add new SendingResultData                                                   SendingDateTime   SadaJe                              SendingEmailAddress   js RecEmailAddress                              SendingEmailMessage   MySendingResultMessage                              SendingEmailSubject   js RecEmailSubject                              SendingEmailSuccess   IsOK                                                                      return MyResList

User · Answer

You could use the System Net Mail MailMessage class of the  NET framework   You can find the MSDN documentation here   Here is a simple example  code snippet    using System Net  using System Net Mail  using System Net Mime       try       SmtpClient mySmtpClient   new SmtpClient  my smtp exampleserver net            set smtp-client with basicAuthentication     mySmtpClient UseDefaultCredentials   false     System Net NetworkCredential basicAuthenticationInfo   new       System Net NetworkCredential  username    password       mySmtpClient Credentials   basicAuthenticationInfo         add from to mailaddresses    MailAddress from   new MailAddress  test example com    TestFromName       MailAddress to   new MailAddress  test2 example com    TestToName       MailMessage myMail   new System Net Mail MailMessage from  to          add ReplyTo    MailAddress replyTo   new MailAddress  reply example com       myMail ReplyToList Add replyTo          set subject and encoding    myMail Subject    Test message      myMail SubjectEncoding   System Text Encoding UTF8         set body-message and encoding    myMail Body     lt b gt Test Mail lt  b gt  lt br gt using  lt b gt HTML lt  b gt        myMail BodyEncoding   System Text Encoding UTF8        text or html    myMail IsBodyHtml   true      mySmtpClient Send myMail      catch  SmtpException ex      throw new ApplicationException       SmtpException has occured      ex Message     catch  Exception ex       throw ex

User · Answer

The best way to send bulk emails for more faster way is to use threads I have written this console application for sending bulk emails I have seperated the bulk email ID into two batches by creating two thread pools   using System  using System Collections Generic  using System Text  using System Threading  using System Net Mail   namespace ConsoleApplication1       public class SendMail                string   NameArray   new string 10     Recipient 1                                                   Recipient 2                                                  Recipient 3                                                  Recipient 4                                                   Recipient 5                                                   Recipient 6                                                   Recipient 7                                                   Recipient 8                                                  Recipient 9                                                  Recipient 10                                                                  public SendMail int i  ManualResetEvent doneEvent                        Console WriteLine  Started sending mail process for  0  -    NameArray i  ToString       at     System DateTime Now ToString                 Console WriteLine                  SmtpClient mailClient   new SmtpClient                mailClient Host   Your host name              mailClient UseDefaultCredentials   true              mailClient Port   Your mail server port number     try with default port no 25              MailMessage mailMessage   new MailMessage FromAddress ToAddress    replace the address value             mailMessage Subject    Testing Bulk mail application               mailMessage Body   NameArray i  ToString                mailMessage IsBodyHtml   true              mailClient Send mailMessage               Console WriteLine  Mail Sent succesfully for  0  -   NameArray i  ToString       at     System DateTime Now ToString                 Console WriteLine                    doneEvent   doneEvent                     public void ThreadPoolCallback Object threadContext                        int threadIndex    int threadContext              Console WriteLine  Thread process completed for  0       threadIndex ToString      at     System DateTime Now ToString                  doneEvent Set                             private ManualResetEvent  doneEvent              public class Program               static int TotalMailCount  Mailcount  AddCount  Counter  i  AssignI            static void Main string   args                        TotalMailCount   10              Mailcount   TotalMailCount   2              AddCount   Mailcount              InitiateThreads                                      Thread Sleep 100000                     static void InitiateThreads                          One event is used for sending mails for each person email id as batch            ManualResetEvent   doneEvents   new ManualResetEvent Mailcount                   Configure and launch threads using ThreadPool              Console WriteLine  Launching thread Pool tasks                    for  i   AssignI  i  lt  Mailcount  i                                              doneEvents i    new ManualResetEvent false                   SendMail SRM mail   new SendMail i  doneEvents i                    ThreadPool QueueUserWorkItem SRM mail ThreadPoolCallback  i                              Thread Sleep 10000                   Wait for all threads in pool to calculation                  try                                     WaitHandle WaitAll doneEvents                                 catch Exception e                                    Console WriteLine e ToString                                     Console WriteLine  All mails are sent in this thread pool                 Counter   Counter 1              Console WriteLine  Please wait while we check for the next thread pool queue                Thread Sleep 5000               CheckBatchMailProcess                                   static  void CheckBatchMailProcess                          if  Counter  lt  2                                Mailcount   Mailcount   AddCount                  AssignI   Mailcount - AddCount                  Console WriteLine  Starting the Next thread Pool                     Thread Sleep 5000                   InitiateThreads                               else                               Console WriteLine  No thread pools to start - exiting the batch mail application                    Thread Sleep 1000                   Environment Exit 0                                        I have defined 10 recepients in the array list for a sample It will create two batches of emails to create two thread pools to send mails You can pick the details from your database also   You can use this code by copying and pasting it in a console application  Replacing the program cs file  Then the application is ready to use   I hope this helps you

User · Answer

Use the namespace System Net Mail   Here is a link to the MSDN page  You can send emails using SmtpClient class   I paraphrased the code sample  so checkout MSDNfor details   MailMessage message   new MailMessage      fromemail contoso com       toemail contoso com       Subject goes here       Body goes here     SmtpClient client   new SmtpClient server   client Send message     The best way to send many emails would be to put something like this in forloop and send away

User · Answer

Below the attached solution work over local machine and server        public static string SendMail string bodyContent                string sendMail               try                        string fromEmail    from gmail com               MailMessage mailMessage   new MailMessage fromEmail   to gmail com    Subject   body               mailMessage IsBodyHtml   true              SmtpClient smtpClient   new SmtpClient  smtp gmail com   587               smtpClient EnableSsl   true              smtpClient UseDefaultCredentials   false              smtpClient Credentials   new NetworkCredential fromEmail  frompassword               smtpClient Send mailMessage                     catch  Exception ex                        sendMail   ex Message ToString                Console WriteLine ex ToString                       return sendMail

User · Answer

You can send email using SMTP or CDO  using SMTP   mail From   new MailAddress  your email address gmail com    mail To Add  to address    mail Subject    Test Mail   mail Body    This is for testing SMTP mail from GMAIL    SmtpServer Port   587  SmtpServer Credentials   new System Net NetworkCredential  username    password    SmtpServer EnableSsl   true    using CDO  CDO Message oMsg   new CDO Message    CDO IConfiguration iConfg  iConfg   oMsg Configuration  ADODB Fields oFields  oFields   iConfg Fields  ADODB Field oField   oFields  http   schemas microsoft com cdo configuration sendusing    oFields Update    oMsg Subject    Test CDO   oMsg From    from address   oMsg To    to address   oMsg TextBody    CDO Mail test   oMsg Send      Source   C  SMTP Email  Source  C  CDO Email

User · Answer

You could use the System Net Mail MailMessage class of the  NET framework   You can find the MSDN documentation here   Here is a simple example  code snippet    using System Net  using System Net Mail  using System Net Mime       try       SmtpClient mySmtpClient   new SmtpClient  my smtp exampleserver net            set smtp-client with basicAuthentication     mySmtpClient UseDefaultCredentials   false     System Net NetworkCredential basicAuthenticationInfo   new       System Net NetworkCredential  username    password       mySmtpClient Credentials   basicAuthenticationInfo         add from to mailaddresses    MailAddress from   new MailAddress  test example com    TestFromName       MailAddress to   new MailAddress  test2 example com    TestToName       MailMessage myMail   new System Net Mail MailMessage from  to          add ReplyTo    MailAddress replyTo   new MailAddress  reply example com       myMail ReplyToList Add replyTo          set subject and encoding    myMail Subject    Test message      myMail SubjectEncoding   System Text Encoding UTF8         set body-message and encoding    myMail Body     lt b gt Test Mail lt  b gt  lt br gt using  lt b gt HTML lt  b gt        myMail BodyEncoding   System Text Encoding UTF8        text or html    myMail IsBodyHtml   true      mySmtpClient Send myMail      catch  SmtpException ex      throw new ApplicationException       SmtpException has occured      ex Message     catch  Exception ex       throw ex

User · Answer

Use the namespace System Net Mail   Here is a link to the MSDN page  You can send emails using SmtpClient class   I paraphrased the code sample  so checkout MSDNfor details   MailMessage message   new MailMessage      fromemail contoso com       toemail contoso com       Subject goes here       Body goes here     SmtpClient client   new SmtpClient server   client Send message     The best way to send many emails would be to put something like this in forloop and send away

User · Answer

You can send email using SMTP or CDO  using SMTP   mail From   new MailAddress  your email address gmail com    mail To Add  to address    mail Subject    Test Mail   mail Body    This is for testing SMTP mail from GMAIL    SmtpServer Port   587  SmtpServer Credentials   new System Net NetworkCredential  username    password    SmtpServer EnableSsl   true    using CDO  CDO Message oMsg   new CDO Message    CDO IConfiguration iConfg  iConfg   oMsg Configuration  ADODB Fields oFields  oFields   iConfg Fields  ADODB Field oField   oFields  http   schemas microsoft com cdo configuration sendusing    oFields Update    oMsg Subject    Test CDO   oMsg From    from address   oMsg To    to address   oMsg TextBody    CDO Mail test   oMsg Send      Source   C  SMTP Email  Source  C  CDO Email

User · Answer

Code   using System Net Mail  new SmtpClient  smtp server com   25  send  from email com                                                to email com                                                subject                                                body      Mass Emails   SMTP servers usually have a limit on the number of connection hat can handle at once  if you try to send hundreds of emails you application may appear unresponsive    Solutions     If you are building a WinForm then use a BackgroundWorker to process the queue   If you are using IIS SMTP server or a SMTP server that has an outbox folder then you can use SmtpClient   PickupDirectoryLocation    c  smtp outboxFolder   This will keep your system responsive   If you are not using a local SMTP server than you could build a system service to use Filewatcher to monitor a forlder than will then process any emails you drop in there

User · Answer

I can strongly recommend the aspNetEmail library  http   www aspnetemail com   The System Net Mail will get you somewhere if your needs are only basic  but if you run into trouble  please check out aspNetEmail  It has saved me a bunch of time  and I know of other develoeprs who also swear by it

User · Answer

Let s make something as a full solution     Maybe it can help as well  It is a solution for sending one email content and one attach file  or without attach  to many Email addresses  Of course sending just one email is possibility as well  Result is List object with data what is OK and what is not   namespace SmtpSendingEmialMessage        public class EmailSetupData               public string EmailFrom   get  set            public string EmailUserName   get  set            public string EmailPassword   get  set            public string EmailSmtpServerName   get  set            public int EmailSmtpPortNumber   get  set            public Boolean SSLActive   get  set      false             public class SendingResultData               public string SendingEmailAddress   get  set            public string SendingEmailSubject   get  set            public DateTime SendingDateTime   get  set            public Boolean SendingEmailSuccess   get  set            public string SendingEmailMessage   get  set              public class OneRecData               public string RecEmailAddress   get  set                  public string RecEmailSubject   get  set                      public class SendingProcess               public string EmailCommonSubjectOptional   get  set                  private EmailSetupData EmailSetupParam   get  set            private List lt OneRecData gt  RecDataList   get  set            private string EmailBodyContent   get  set            private Boolean IsEmailBodyHtml   get  set            private string EmailAttachFilePath   get  set             public SendingProcess List lt OneRecData gt  MyRecDataList  String MyEmailTextContent  String MyEmailAttachFilePath  EmailSetupData MyEmailSetupParam  Boolean EmailBodyHtml                        RecDataList   MyRecDataList              EmailBodyContent   MyEmailTextContent              EmailAttachFilePath   MyEmailAttachFilePath              EmailSetupParam   MyEmailSetupParam              IsEmailBodyHtml   EmailBodyHtml                     public List lt SendingResultData gt  SendAll                         List lt SendingResultData gt  MyResList   new List lt SendingResultData gt                 foreach  var js in RecDataList                                using  System Net Mail MailMessage MyMes   new System Net Mail MailMessage                                          DateTime SadaJe   DateTime Now                      Boolean IsOK   true                      String MySendingResultMessage    Sending OK                        String MessageSubject   EmailCommonSubjectOptional                      if  MessageSubject                                                      MessageSubject   js RecEmailSubject                                             try                                                System Net Mail MailAddress MySenderAdd   new System Net Mail MailAddress js RecEmailAddress                           MyMes To Add MySenderAdd                           MyMes Subject   MessageSubject                          MyMes Body   EmailBodyContent                          MyMes Sender   new System Net Mail MailAddress EmailSetupParam EmailFrom                           MyMes ReplyToList Add MySenderAdd                           MyMes IsBodyHtml   IsEmailBodyHtml                                             catch Exception ex                                                IsOK   false                          MySendingResultMessage   Sender or receiver Email address error      ex Message                                             if  IsOK    true                                                try                                                       if  EmailAttachFilePath    null                                                                if  EmailAttachFilePath Length  gt  5                                                                        MyMes Attachments Add new System Net Mail Attachment EmailAttachFilePath                                                                                                                      catch  Exception ex                                                        IsOK   false                              MySendingResultMessage   Emial attach error       ex Message                                                     if  IsOK    true                                                        using  System Net Mail SmtpClient MyCl   new System Net Mail SmtpClient                                                                  MyCl EnableSsl   EmailSetupParam SSLActive                                  MyCl Host   EmailSetupParam EmailSmtpServerName                                  MyCl Port   EmailSetupParam EmailSmtpPortNumber                                  try                                                                       MyCl Credentials   new System Net NetworkCredential EmailSetupParam EmailUserName  EmailSetupParam EmailPassword                                                                     catch  Exception ex                                                                        IsOK   false                                      MySendingResultMessage    Emial credential error      ex Message                                                                     if  IsOK    true                                                                        try                                                                               MyCl Send MyMes                                                                             catch  Exception ex                                                                                IsOK   false                                          MySendingResultMessage    Emial sending error      ex Message                                                                                                                                                                             MyResList Add new SendingResultData                                                   SendingDateTime   SadaJe                              SendingEmailAddress   js RecEmailAddress                              SendingEmailMessage   MySendingResultMessage                              SendingEmailSubject   js RecEmailSubject                              SendingEmailSuccess   IsOK                                                                      return MyResList

User · Answer

You can use Mailkit  MailKit is an Open Source cross-platform  NET mail-client library that is based on MimeKit and optimized for mobile devices   It has more and advance features better than System Net Mail   A fully-cancellable Pop3Client with support for STLS  UIDL  APOP  PIPELINING  UTF8  and LANG   Client-side sorting and threading of messages  the Ordinal Subject and the Jamie Zawinski threading algorithms are supported   Asynchronous versions of all methods that hit the network  S MIME  OpenPGP and DKIM signature support via MimeKit  Microsoft TNEF support via MimeKit    See this example you can send mail               MimeMessage mailMessage   new MimeMessage                mailMessage From Add new MailboxAddress senderName  sender address com                mailMessage Sender   new MailboxAddress senderName  sender address com               mailMessage To Add new MailboxAddress emailid  emailid                mailMessage Subject   subject              mailMessage ReplyTo Add new MailboxAddress replyToAddress                mailMessage Subject   subject              var builder   new BodyBuilder                builder TextBody    Hello There                           try                               using  var smtpClient   new SmtpClient                                          smtpClient Connect  HostName    Port   MailKit Security SecureSocketOptions None                       smtpClient Authenticate  user name com    password                         smtpClient Send mailMessage                       Console WriteLine  Success                                                catch  SmtpCommandException ex                                Console WriteLine ex ToString                                             catch  Exception ex                                Console WriteLine ex ToString                                     You can download from here

User · Answer

Code   using System Net Mail  new SmtpClient  smtp server com   25  send  from email com                                                to email com                                                subject                                                body      Mass Emails   SMTP servers usually have a limit on the number of connection hat can handle at once  if you try to send hundreds of emails you application may appear unresponsive    Solutions     If you are building a WinForm then use a BackgroundWorker to process the queue   If you are using IIS SMTP server or a SMTP server that has an outbox folder then you can use SmtpClient   PickupDirectoryLocation    c  smtp outboxFolder   This will keep your system responsive   If you are not using a local SMTP server than you could build a system service to use Filewatcher to monitor a forlder than will then process any emails you drop in there

User · Answer

Take a  look at the FluentEmail library  I ve blogged about it here  You have a nice and fluent api for your needs   Email FromDefault     To  you domain com     Subject  New order has arrived      Body  The order details are          Send

User · Answer

The  NET framework has some built-in classes which allows you to send e-mail via your app   You should take a look in the System Net Mail namespace  where you ll find the MailMessage and SmtpClient classes  You can set the BodyFormat of the MailMessage class to MailFormat Html   It could also be helpfull if you make use of the AlternateViews property of the MailMessage class  so that you can provide a plain-text version of your mail  so that it can be read by clients that do not support HTML   http   msdn microsoft com en-us library system net mail mailmessage alternateviews aspx

User · Answer

I can strongly recommend the aspNetEmail library  http   www aspnetemail com   The System Net Mail will get you somewhere if your needs are only basic  but if you run into trouble  please check out aspNetEmail  It has saved me a bunch of time  and I know of other develoeprs who also swear by it

User · Answer

The  NET framework has some built-in classes which allows you to send e-mail via your app   You should take a look in the System Net Mail namespace  where you ll find the MailMessage and SmtpClient classes  You can set the BodyFormat of the MailMessage class to MailFormat Html   It could also be helpfull if you make use of the AlternateViews property of the MailMessage class  so that you can provide a plain-text version of your mail  so that it can be read by clients that do not support HTML   http   msdn microsoft com en-us library system net mail mailmessage alternateviews aspx

User · Answer

The best way to send bulk emails for more faster way is to use threads I have written this console application for sending bulk emails I have seperated the bulk email ID into two batches by creating two thread pools   using System  using System Collections Generic  using System Text  using System Threading  using System Net Mail   namespace ConsoleApplication1       public class SendMail                string   NameArray   new string 10     Recipient 1                                                   Recipient 2                                                  Recipient 3                                                  Recipient 4                                                   Recipient 5                                                   Recipient 6                                                   Recipient 7                                                   Recipient 8                                                  Recipient 9                                                  Recipient 10                                                                  public SendMail int i  ManualResetEvent doneEvent                        Console WriteLine  Started sending mail process for  0  -    NameArray i  ToString       at     System DateTime Now ToString                 Console WriteLine                  SmtpClient mailClient   new SmtpClient                mailClient Host   Your host name              mailClient UseDefaultCredentials   true              mailClient Port   Your mail server port number     try with default port no 25              MailMessage mailMessage   new MailMessage FromAddress ToAddress    replace the address value             mailMessage Subject    Testing Bulk mail application               mailMessage Body   NameArray i  ToString                mailMessage IsBodyHtml   true              mailClient Send mailMessage               Console WriteLine  Mail Sent succesfully for  0  -   NameArray i  ToString       at     System DateTime Now ToString                 Console WriteLine                    doneEvent   doneEvent                     public void ThreadPoolCallback Object threadContext                        int threadIndex    int threadContext              Console WriteLine  Thread process completed for  0       threadIndex ToString      at     System DateTime Now ToString                  doneEvent Set                             private ManualResetEvent  doneEvent              public class Program               static int TotalMailCount  Mailcount  AddCount  Counter  i  AssignI            static void Main string   args                        TotalMailCount   10              Mailcount   TotalMailCount   2              AddCount   Mailcount              InitiateThreads                                      Thread Sleep 100000                     static void InitiateThreads                          One event is used for sending mails for each person email id as batch            ManualResetEvent   doneEvents   new ManualResetEvent Mailcount                   Configure and launch threads using ThreadPool              Console WriteLine  Launching thread Pool tasks                    for  i   AssignI  i  lt  Mailcount  i                                              doneEvents i    new ManualResetEvent false                   SendMail SRM mail   new SendMail i  doneEvents i                    ThreadPool QueueUserWorkItem SRM mail ThreadPoolCallback  i                              Thread Sleep 10000                   Wait for all threads in pool to calculation                  try                                     WaitHandle WaitAll doneEvents                                 catch Exception e                                    Console WriteLine e ToString                                     Console WriteLine  All mails are sent in this thread pool                 Counter   Counter 1              Console WriteLine  Please wait while we check for the next thread pool queue                Thread Sleep 5000               CheckBatchMailProcess                                   static  void CheckBatchMailProcess                          if  Counter  lt  2                                Mailcount   Mailcount   AddCount                  AssignI   Mailcount - AddCount                  Console WriteLine  Starting the Next thread Pool                     Thread Sleep 5000                   InitiateThreads                               else                               Console WriteLine  No thread pools to start - exiting the batch mail application                    Thread Sleep 1000                   Environment Exit 0                                        I have defined 10 recepients in the array list for a sample It will create two batches of emails to create two thread pools to send mails You can pick the details from your database also   You can use this code by copying and pasting it in a console application  Replacing the program cs file  Then the application is ready to use   I hope this helps you

User · Answer

Below the attached solution work over local machine and server        public static string SendMail string bodyContent                string sendMail               try                        string fromEmail    from gmail com               MailMessage mailMessage   new MailMessage fromEmail   to gmail com    Subject   body               mailMessage IsBodyHtml   true              SmtpClient smtpClient   new SmtpClient  smtp gmail com   587               smtpClient EnableSsl   true              smtpClient UseDefaultCredentials   false              smtpClient Credentials   new NetworkCredential fromEmail  frompassword               smtpClient Send mailMessage                     catch  Exception ex                        sendMail   ex Message ToString                Console WriteLine ex ToString                       return sendMail

User · Answer

You could use the System Net Mail MailMessage class of the  NET framework   You can find the MSDN documentation here   Here is a simple example  code snippet    using System Net  using System Net Mail  using System Net Mime       try       SmtpClient mySmtpClient   new SmtpClient  my smtp exampleserver net            set smtp-client with basicAuthentication     mySmtpClient UseDefaultCredentials   false     System Net NetworkCredential basicAuthenticationInfo   new       System Net NetworkCredential  username    password       mySmtpClient Credentials   basicAuthenticationInfo         add from to mailaddresses    MailAddress from   new MailAddress  test example com    TestFromName       MailAddress to   new MailAddress  test2 example com    TestToName       MailMessage myMail   new System Net Mail MailMessage from  to          add ReplyTo    MailAddress replyTo   new MailAddress  reply example com       myMail ReplyToList Add replyTo          set subject and encoding    myMail Subject    Test message      myMail SubjectEncoding   System Text Encoding UTF8         set body-message and encoding    myMail Body     lt b gt Test Mail lt  b gt  lt br gt using  lt b gt HTML lt  b gt        myMail BodyEncoding   System Text Encoding UTF8        text or html    myMail IsBodyHtml   true      mySmtpClient Send myMail      catch  SmtpException ex      throw new ApplicationException       SmtpException has occured      ex Message     catch  Exception ex       throw ex

User · Answer

Use the namespace System Net Mail   Here is a link to the MSDN page  You can send emails using SmtpClient class   I paraphrased the code sample  so checkout MSDNfor details   MailMessage message   new MailMessage      fromemail contoso com       toemail contoso com       Subject goes here       Body goes here     SmtpClient client   new SmtpClient server   client Send message     The best way to send many emails would be to put something like this in forloop and send away

User · Answer

You can use Mailkit  MailKit is an Open Source cross-platform  NET mail-client library that is based on MimeKit and optimized for mobile devices   It has more and advance features better than System Net Mail   A fully-cancellable Pop3Client with support for STLS  UIDL  APOP  PIPELINING  UTF8  and LANG   Client-side sorting and threading of messages  the Ordinal Subject and the Jamie Zawinski threading algorithms are supported   Asynchronous versions of all methods that hit the network  S MIME  OpenPGP and DKIM signature support via MimeKit  Microsoft TNEF support via MimeKit    See this example you can send mail               MimeMessage mailMessage   new MimeMessage                mailMessage From Add new MailboxAddress senderName  sender address com                mailMessage Sender   new MailboxAddress senderName  sender address com               mailMessage To Add new MailboxAddress emailid  emailid                mailMessage Subject   subject              mailMessage ReplyTo Add new MailboxAddress replyToAddress                mailMessage Subject   subject              var builder   new BodyBuilder                builder TextBody    Hello There                           try                               using  var smtpClient   new SmtpClient                                          smtpClient Connect  HostName    Port   MailKit Security SecureSocketOptions None                       smtpClient Authenticate  user name com    password                         smtpClient Send mailMessage                       Console WriteLine  Success                                                catch  SmtpCommandException ex                                Console WriteLine ex ToString                                             catch  Exception ex                                Console WriteLine ex ToString                                     You can download from here

User · Answer

You could use the System Net Mail MailMessage class of the  NET framework   You can find the MSDN documentation here   Here is a simple example  code snippet    using System Net  using System Net Mail  using System Net Mime       try       SmtpClient mySmtpClient   new SmtpClient  my smtp exampleserver net            set smtp-client with basicAuthentication     mySmtpClient UseDefaultCredentials   false     System Net NetworkCredential basicAuthenticationInfo   new       System Net NetworkCredential  username    password       mySmtpClient Credentials   basicAuthenticationInfo         add from to mailaddresses    MailAddress from   new MailAddress  test example com    TestFromName       MailAddress to   new MailAddress  test2 example com    TestToName       MailMessage myMail   new System Net Mail MailMessage from  to          add ReplyTo    MailAddress replyTo   new MailAddress  reply example com       myMail ReplyToList Add replyTo          set subject and encoding    myMail Subject    Test message      myMail SubjectEncoding   System Text Encoding UTF8         set body-message and encoding    myMail Body     lt b gt Test Mail lt  b gt  lt br gt using  lt b gt HTML lt  b gt        myMail BodyEncoding   System Text Encoding UTF8        text or html    myMail IsBodyHtml   true      mySmtpClient Send myMail      catch  SmtpException ex      throw new ApplicationException       SmtpException has occured      ex Message     catch  Exception ex       throw ex

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The  NET framework has some built-in classes which allows you to send e-mail via your app   You should take a look in the System Net Mail namespace  where you ll find the MailMessage and SmtpClient classes  You can set the BodyFormat of the MailMessage class to MailFormat Html   It could also be helpfull if you make use of the AlternateViews property of the MailMessage class  so that you can provide a plain-text version of your mail  so that it can be read by clients that do not support HTML   http   msdn microsoft com en-us library system net mail mailmessage alternateviews aspx

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