How to send email in ASP NET C

Question

I m very new to the ASP NET C  area  I m planning to send a mail through ASP NET C  and this is the SMTP address from my ISP    smtp-proxy tm net my   Below is what I tried to do  but failed    lt    Page Language  C   AutoEventWireup  true  CodeFile  Default aspx cs  Inherits  SendMail    gt   lt html gt   lt head id  Head1  runat  server  gt  lt title gt Email Test Page lt  title gt  lt  head gt   lt body gt       lt form id  form1  runat  server  gt          Message to   lt asp TextBox ID  txtTo  runat  server    gt  lt br gt          Message from   lt asp TextBox ID  txtFrom  runat  server    gt  lt br gt          Subject   lt asp TextBox ID  txtSubject  runat  server    gt  lt br gt          Message Body  lt br gt           lt asp TextBox ID  txtBody  runat  server  Height  171px  TextMode  MultiLine   Width  270px    gt  lt br gt           lt asp Button ID  Btn SendMail  runat  server  onclick  Btn SendMail Click  Text  Send Email    gt  lt br gt           lt asp Label ID  Label1  runat  server  Text  Label  gt  lt  asp Label gt       lt  form gt   lt  body gt   lt  html gt    And below is my code-behind   using System  using System Web UI WebControls  using System Net Mail  public partial class SendMail   System Web UI Page       protected void Btn SendMail Click object sender  EventArgs e                MailMessage mailObj   new MailMessage              txtFrom Text  txtTo Text  txtSubject Text  txtBody Text           SmtpClient SMTPServer   new SmtpClient  127 0 0 1            try                       SMTPServer Send mailObj                     catch  Exception ex                        Label1 Text   ex ToString                        PS  I m sorry that I couldn t understand the receiver sender SMTP concept  and so I am trying to understand the whole concept from here

User · Answer

You can try MailKit MailKit is an Open Source cross-platform  NET mail-client library that is based on MimeKit and optimized for mobile devices  You can use easily in your application You can download from here                   MimeMessage mailMessage   new MimeMessage                    mailMessage From Add new MailboxAddress fromName  from 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

User · Answer

This is the easiest script to test    lt    Import Namespace  System Net    gt    lt    Import Namespace  System Net Mail    gt     lt script language  C   runat  server  gt       protected void Page Load object sender  EventArgs e                   create the mail message          MailMessage mail   new MailMessage                set the addresses          mail From   new MailAddress  From email account             mail To Add  To email account                set the content          mail Subject    This is a test email from C  script            mail Body    This is a test email from C  script              send the message           SmtpClient smtp   new SmtpClient  mail domainname com               NetworkCredential Credentials   new NetworkCredential  to email account    Password              smtp Credentials   Credentials           smtp Send mail             lblMessage Text    Mail Sent            lt  script gt    lt html gt    lt body gt        lt form runat  server  gt            lt asp Label id  lblMessage  runat  server  gt  lt  asp Label gt        lt  form gt    lt  body gt

User · Answer

Just go through the below code   SmtpClient smtpClient   new SmtpClient  mail MyWebsiteDomainName com   25    smtpClient Credentials   new System Net NetworkCredential  info MyWebsiteDomainName com    myIDPassword       smtpClient UseDefaultCredentials   true     uncomment if you don t want to use the network credentials smtpClient DeliveryMethod   SmtpDeliveryMethod Network  smtpClient EnableSsl   true  MailMessage mail   new MailMessage       Setting From   To and CC mail From   new MailAddress  info MyWebsiteDomainName    MyWeb Site    mail To Add new MailAddress  info MyWebsiteDomainName     mail CC Add new MailAddress  MyEmailID gmail com      smtpClient Send mail

User · Answer

You can try this using hotmail like this -  MailMessage o   new MailMessage  From    To   Subject    Body    NetworkCredential netCred  new NetworkCredential  Sender Email   Sender Password    SmtpClient smtpobj  new SmtpClient  smtp live com   587    smtpobj EnableSsl   true  smtpobj Credentials   netCred  smtpobj Send o

User · Answer

Try the following     try       var fromEmailAddress    ConfigurationManager AppSettings  FromEmailAddress   ToString        var fromEmailDisplayName   ConfigurationManager AppSettings  FromEmailDisplayName   ToString        var fromEmailPassword   ConfigurationManager AppSettings  FromEmailPassword   ToString        var smtpHost   ConfigurationManager AppSettings  SMTPHost   ToString        var smtpPort   ConfigurationManager AppSettings  SMTPPort   ToString         string body    Your registration has been done successfully  Thank you        MailMessage message   new MailMessage new MailAddress fromEmailAddress  fromEmailDisplayName   new MailAddress ud LoginId  ud FullName        message Subject    Thank You For Your Registration       message IsBodyHtml   true      message Body   body       var client   new SmtpClient        client Credentials   new NetworkCredential fromEmailAddress  fromEmailPassword       client Host   smtpHost      client EnableSsl   true      client Port    string IsNullOrEmpty smtpPort    Convert ToInt32 smtpPort    0      client Send message     catch  Exception ex        throw  new Exception  Mail send failed to loginId     ud LoginId      though registration done          And then in you web config add the following in between    lt  --Email Config-- gt   lt add key  FromEmailAddress  value  sender emailaddress   gt   lt add key  FromEmailDisplayName  value  Display Name   gt   lt add key  FromEmailPassword  value  sender Password   gt   lt add key  SMTPHost  value  smtp-proxy tm net my   gt   lt add key  SMTPPort  value  smptp Port   gt

User · Answer

If you want to generate your email bodies in razor  you can use Mailzory  Also  you can download the nuget package from here      template path var viewPath   Path Combine  Views Emails    hello cshtml       read the content of template and pass it to the Email constructor var template   File ReadAllText viewPath    var email   new Email template       set ViewBag properties email ViewBag Name    Johnny   email ViewBag Content    Mailzory Is Funny       send email var task   email SendAsync  mailzory outlook com    subject    task Wait

User · Answer

Check this out      it works  http   www aspnettutorials com tutorials email email-aspnet2-csharp   using System  using System Data  using System Configuration  using System Web  using System Web Security  using System Web UI  using System Web UI WebControls  using System Web UI WebControls WebParts  using System Web UI HtmlControls  using System Net Mail   public partial class  Default   System Web UI Page       protected void Page Load object sender  EventArgs e                    protected void btnSubmit Click object sender  EventArgs e                try                       MailMessage message   new MailMessage txtFrom Text  txtTo Text  txtSubject Text  txtBody Text               SmtpClient emailClient   new SmtpClient txtSMTPServer Text               emailClient Send message               litStatus Text    Message Sent                     catch  Exception ex                        litStatus Text ex ToString

User · Answer

According to this       SmtpClient and its network of types are poorly designed  we strongly   recommend you use https   github com jstedfast MailKit and   https   github com jstedfast MimeKit instead    Reference   https   docs microsoft com en-us dotnet api system net mail smtpclient view netframework-4 8  It s better to use MailKit to send emails    var message   new MimeMessage                 message From Add  new MailboxAddress   Joey Tribbiani    joey friends com                 message To Add  new MailboxAddress   Mrs  Chanandler Bong    chandler friends com                 message Subject    How you doin                  message Body   new TextPart   plain                     Text     Hey Chandler  I just wanted to let you know that Monica and I were going to go play some paintball  you in  -- Joey                              using  var client   new SmtpClient                          For demo-purposes  accept all SSL certificates  in case the server supports STARTTLS                  client ServerCertificateValidationCallback    s c h e    gt  true                   client Connect   smtp friends com   587  false                       Note  only needed if the SMTP server requires authentication                 client Authenticate   joey    password                     client Send  message                   client Disconnect  true

User · Answer

MailMessage mm   new MailMessage txtEmail Text  txtTo Text   mm Subject   txtSubject Text  mm Body   txtBody Text  if  fuAttachment HasFile   file upload select or not       string FileName   Path GetFileName fuAttachment PostedFile FileName       mm Attachments Add new Attachment fuAttachment PostedFile InputStream  FileName      mm IsBodyHtml   false  SmtpClient smtp   new SmtpClient    smtp Host    smtp gmail com   smtp EnableSsl   true  NetworkCredential NetworkCred   new NetworkCredential txtEmail Text  txtPassword Text   smtp UseDefaultCredentials   true  smtp Credentials   NetworkCred  smtp Port   587  smtp Send mm   Response write  Send Mail      View Video  https   www youtube com watch v bUUNv-19QAI

User · Answer

Try using this code instead  Note  In the  from address  give your correct email id and password   protected void btn send Click object sender  EventArgs e         System Net Mail MailMessage mail   new System Net Mail MailMessage        mail To Add  to gmail address        mail From   new MailAddress  from gmail address    Email head   System Text Encoding UTF8       mail Subject    This mail is send from asp net application       mail SubjectEncoding   System Text Encoding UTF8      mail Body    This is Email Body Text       mail BodyEncoding   System Text Encoding UTF8      mail IsBodyHtml   true      mail Priority   MailPriority High      SmtpClient client   new SmtpClient        client Credentials   new System Net NetworkCredential  from gmail address    your gmail account password        client Port   587      client Host    smtp gmail com       client EnableSsl   true      try               client Send mail           Page RegisterStartupScript  UserMsg     lt script gt alert  Successfully Send      if alert   window location  SendMail aspx    lt  script gt               catch  Exception ex                Exception ex2   ex          string errorMessage   string Empty          while  ex2    null                        errorMessage    ex2 ToString                ex2   ex2 InnerException                    Page RegisterStartupScript  UserMsg     lt script gt alert  Sending Failed      if alert   window location  SendMail aspx    lt  script gt

User · Answer

Just pass parameter like body - The content query   from  the customer  subject - subject that defined in mail subject  username - nothing name anything  mail - mail  required     public static bool SendMail String body  String subject  string username  String mail                bool isSendSuccess   false          try                       var fromEmailAddress   ConfigurationManager AppSettings  quot FromEmailAddress quot   ToString                var fromEmailDisplayName   ConfigurationManager AppSettings  quot FromEmailDisplayName quot   ToString                var fromEmailPassword   ConfigurationManager AppSettings  quot FromEmailPassword quot   ToString                var smtpHost   ConfigurationManager AppSettings  quot SMTPHost quot   ToString                var smtpPort   ConfigurationManager AppSettings  quot SMTPPort quot   ToString                  MailMessage message   new MailMessage new MailAddress fromEmailAddress  fromEmailDisplayName                   new MailAddress mail  username                message Subject   subject              message IsBodyHtml   true              message Body   body               var client   new SmtpClient                client UseDefaultCredentials   false              client Credentials   new NetworkCredential fromEmailAddress  fromEmailPassword               client Host   smtpHost              client EnableSsl   false              client Port    string IsNullOrEmpty smtpPort    Convert ToInt32 smtpPort    0              client Send message               isSendSuccess   true                    catch  Exception ex                        throw  new Exception  quot Mail send failed to loginId  quot    mail    quot   though registration done  quot  ex ToString    quot  n quot  ex StackTrace                       return isSendSuccess         if your using go daddy server  this work   add this in web config     lt appSettings gt      ---other ---setting       lt add key  quot FromEmailAddress quot  value  quot myemail gmail com quot    gt       lt add key  quot FromEmailDisplayName quot  value  quot anyname quot    gt       lt add key  quot FromEmailPassword quot  value  quot mypassword  quot    gt       lt add key  quot SMTPHost quot  value  quot relay-hosting secureserver net quot    gt       lt add key  quot SMTPPort quot  value  quot 25 quot    gt    lt  appSettings gt   if you are using localhost or vps server change this configuration to this   lt appSettings gt      ---other ---setting       lt add key  quot FromEmailAddress quot  value  quot myemail gmail com quot    gt       lt add key  quot FromEmailDisplayName quot  value  quot anyname quot    gt       lt add key  quot FromEmailPassword quot  value  quot mypassword  quot    gt       lt add key  quot SMTPHost quot  value  quot smtp gmail com quot    gt        lt add key  quot SMTPPort quot  value  quot 587 quot    gt   lt  appSettings gt   change the code           client EnableSsl   true   if your are using gmail please enable secure app  using this link https   myaccount google com lesssecureapps pli 1 amp rapt AEjHL4Pd6h3XxE663Flvd-FfeRXxW eNrIsGTBlZklgkAHZEeuHvheCQuZ1-djB9uIWaB-2EV7hyLCU0dWKA7D0JzYKe4ZRkuA

User · Answer

using System      using System Collections Generic      using System Linq      using System Web      using System Globalization      using System Text RegularExpressions                lt summary gt          Summary description for RegexUtilities          lt  summary gt      public class RegexUtilities               bool InValid   false               public bool IsValidEmail string strIn                        InValid   false              if  String IsNullOrEmpty strIn                   return false                      Use IdnMapping class to convert Unicode domain names              strIn   Regex Replace strIn    quot          quot   this DomainMapper               if  InValid                  return false                      Return true if strIn is in valid e-mail format               return Regex IsMatch strIn    quot      quot  quot    quot  quot    quot  quot     quot  quot       0-9a-z              -      amp                     w       lt   0-9a-z      quot      quot            d 1 3     3  d 1 3        0-9a-z  - w   0-9a-z       a-z0-9  2 17     quot                      RegexOptions IgnoreCase                          private string DomainMapper Match match                           IdnMapping class with default property values              IdnMapping idn   new IdnMapping                     string domainName   match Groups 2  Value              try                               domainName   idn GetAscii domainName                             catch  ArgumentException                                InValid   true                            return match Groups 1  Value   domainName                           private void GetSendEmInfo                  region For Get All Type Email Informations             IPL DoId   ddlName SelectedValue          DataTable dt   IdBL GetEmailS IPL           if  dt Rows Count  gt  0                        hid MailId Value   dt Rows 0   quot MailId quot   ToString                hid UsedPName Value   dt Rows 0   quot UName quot   ToString                hid EmailSubject Value   dt Rows 0   quot EmailSubject quot   ToString                hid EmailBody Value   dt Rows 0   quot EmailBody quot   ToString                hid EmailIdName Value   dt Rows 0   quot EmailIdName quot   ToString                hid EmPass Value   dt Rows 0   quot EPass quot   ToString                hid SeName Value   dt Rows 0   quot SenName quot   ToString                hid TNo Value   dt Rows 0   quot TeNo quot   ToString                hid EmaLimit Value   dt Rows 0   quot EmailLimit quot   ToString                hidlink Value   dt Rows 0  link quot   ToString                       endregion           region For Set Some Local Variables             int StartLmt  FinalLmt  SendCurrentMail          StartLmt   FinalLmt   SendCurrentMail   0          bool Valid LimitMail          Valid LimitMail   true             For Get Finalize Limit For Send Mail            FinalLmt   Convert ToInt32 hid EmailmaxLimit Value            region For Check Email Valid Limits             if  FinalLmt  gt  0                        Valid LimitMail   true                    else                       Valid LimitMail   false                     endregion            For Get Finalize Limit For Send Mail             endregion          if  Valid LimitMail    true                         region For Send Current Email Status                 bool EmaiValid              string CreateFileName              string retmailflg   null              EmaiValid   false               endregion               region For Set Start Limit And FinalLimit Send No Of Email                 mPL SendDate   DateTime Now ToString  quot dd-MMM-yyyy quot                DataTable dtsendEmail   m1BL GetEmailSendLog mPL               if  dtsendEmail Rows Count  gt  0                                StartLmt   Convert ToInt32 dtsendEmail Rows 0   quot SendNo Of Email quot   ToString                               else                               StartLmt   0                             endregion               region For Find Grid View Controls                 for  int i   0  i  lt  GrdEm Rows Count  i                                   region For Find Grid view Controls                     CheckBox Chk SelectOne    CheckBox GrdEmp Rows i  FindControl  quot chkSingle quot                    Label lbl No    Label GrdEmAtt Rows i  FindControl  quot lblGrdCode quot                    lblCode Value   lbl InNo Text                   Label lbl EmailId    Label GrdEomAtt Rows i  FindControl  quot lblGrdEmpEmail quot                      endregion                     Region For If Check Box Checked Then                    if  Chk SelectOne Checked    true                                        if   string IsNullOrEmpty lbl EmailId Text                                                  region For When Check Box Checked                                If Start Limit Less Or Equal To Then Condition Performs                            if  StartLmt  lt  FinalLmt                                                        StartLmt   StartLmt   1                                                    else                                                       Valid LimitMail   false                              EmaiValid   false                                                       End Region                            string   SplitClients Email   lbl EmailId Text Split                               string Send Email  Hold Email                          Send Email   Hold Email    quot  quot                            int CountEmail    Region For Count Total Email                            CountEmail   0    First Time Email Counts Zero                             Hold Email   SplitClients Email 0  ToString   Trim   TrimEnd   TrimStart   ToString                               Region For If Clients Have One Email                             region For First Emails Send On Client                             if  SplitClients Email 0  ToString       quot  quot                                                         if  EmailRegex IsValidEmail Hold Email                                                                 Send Email   Hold Email                                  CountEmail   1                                  EmaiValid   true                                                            else                                                               EmaiValid   false                                                                                   endregion                            Region For If Clients Have One Email                               Region For If Clients Have Two Email                                Region For If Clients Have Two Email                            if  EmaiValid    true                                                         region For Create Email Body And Create File Name                                   fofile   Server MapPath  quot PDFs quot                                fofile   Server MapPath  quot   vvv vvvv  quot      quot   quot                               CreateFileName   lbl INo Text ToString      quot  1 quot     quot  Pdf quot     Create File Name                                string   orimail   Send Email Split                                   string Billbody  TempInvoiceId                                 DateTime dtLstdate   new DateTime Convert ToInt32 txtYear Text   Convert ToInt32 ddlMonth SelectedValue   16                                    DateTime IndtLmt   dtLstdate AddMonths 1                               TempInvoiceId    quot  quot                                  byte   Buffer   Encrypt Encryptiondata lbl InvoiceNo Text ToString                                   TempInvoiceId   Convert ToBase64String Buffer                                  region Create Encrypted Path                               byte   EncCode   Encrypt Encryptiondata lbl INo Text                               hidEncrypteCode Value   Convert ToBase64String EncECode                                endregion                                                           region Create Email Body                                  body   hid EmailBody Value Replace  quot  greeting quot   lbl CoName Text  Replace  quot  free quot   hid ToNo Value  Replace  quot  llnk quot    quot  lt a style  font-family  Tahoma  font-size  10pt  color   800000  font-weight  bold  href  http   1ccccc ccc ccc ccc aspx EC  quot    hidEncryptedCode Value   quot    gt  C cccccccc  lt  a gt  quot                                                            body   hid EmailBody Value Replace  quot  greeting quot    quot Hii quot   Replace  quot  No quot   hid No Value    For Mail                                  endregion                                 region For Email Sender Informations                                 for  int j   0  j  lt  CountEmail  j                                                                    if  File Exists fofile    quot    quot    CreateFileName                                                                        region                                 lbl EmailId Text   orimail j                                   retmailflg    quot  quot                                       Region For Send Email For Clients                                      retmailflg   SendPreMail  quot Wp From  quot    lbl CName Text    quot  quot   body  lbl EmailId Text  lbl IeNo Text  hid EmailIdName Value  hid EmailPassword Value                                   retmailflg   SendPreMail hid EmailSubject Value  Body  lbl EmailId Text  lbl No Text  hid EmailIdName Value  hid EmailPassword Value                                      End Region                                        Region For Create Send Email Log  When Email Send Successfully                                    if  retmailflg     quot True quot                                                                         SendCurrentMail   Convert ToInt32 SendCurrentMail    1                                      StartLmt   Convert ToInt32 StartLmt    1                                       if  SendCurrentMail  gt  0                                                                                CreateEmailLog lbl InNo Text  StartLmt  hid EmailIdName Value  lbl EmailId Text                                                                                                                                                                                         End Region                                     endregion                                                                                                endregion                                                    endregion                                                            End Region                               endregion                              private void CreateEmailLog string UniqueId  int StartLmt  string FromEmailId  string TotxtEmailId                FPL EmailId From   FromEmailId          FPL To EmailId   TotxtEmailId          FPL SendDate   DateTime Now ToString  quot dd-MMM-yyyy quot            FPL EmailUniqueId   UniqueId          FPL SendNo Of Email   StartLmt ToString            FPL LoginUserId   Session  quot LoginUserId quot   ToString            int i   FBL InsertEmaDoc FPL              public string SendPreMail string emsub  string embody  string EmailId  string FileId  string EmailFromId  string Password                string retval    quot False quot           try                       string emailBody  emailSubject  emailToList  emailFrom              accountPassword  smtpServer              bool enableSSL              int port               emailBody   embody              emailSubject   emsub              emailToList   EmailId              emailFrom   EmailFromId              accountPassword   Password              smtpServer    quot smtp gmail com quot               enableSSL   true              port   587               string crefilename              string fofile              fofile   Server MapPath  quot PDF quot                crefilename   FileId    quot  Pdf quot                string   att     crefilename                 string retemail  insertqry              retemail    quot  quot                retemail   SendEmail emailBody  emailSubject  emailFrom  emailToList  att  smtpServer  enableSSL  accountPassword  port                if  retemail     quot True quot                                  retval   retemail                                  catch                       retval    quot False quot                     finally                              return retval             public string SendEmail string emailBody  string emailSubject  string emailFrom  string emailToList  string   attachedFiles  string smtpIPAddress  bool enableSSL  string accountPassword  int port                MailMessage mail   new MailMessage            string retflg          retflg    quot False quot           try                       mail From   new MailAddress emailFrom               if  emailToList Contains  quot   quot                                  emailToList   emailToList Replace  quot   quot    quot   quot                              mail To Add emailToList                mail Subject   emailSubject              mail IsBodyHtml   true              mail Body   emailBody                SmtpClient smtp   new SmtpClient                smtp Host    quot smtp gmail com quot               smtp EnableSsl   true              NetworkCredential NetworkCred   new NetworkCredential emailFrom  accountPassword               smtp UseDefaultCredentials   true              smtp Credentials   NetworkCred              smtp Port   587              smtp Send mail               retflg    quot True quot                      catch                       retflg    quot False quot                     finally                       mail Dispose                      return retflg

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