Why do I get property cannot be assigned when sending an SMTP email

Question

I can t understand why this code is not working  I get an error saying property can not be assigned  MailMessage mail   new MailMessage    SmtpClient client   new SmtpClient                client Port   25  client DeliveryMethod   SmtpDeliveryMethod Network  client UseDefaultCredentials   false  client Host    smtp gmail com   mail To    user hotmail com       lt -- this one mail From    you yourcompany com   mail Subject    this is a test email    mail Body    this is my test email body   client Send mail

User · Answer

If you want to have your email and password not appear in your code and want your company email client server to use your windows credentials use below.

client.Credentials = CredentialCache.DefaultNetworkCredentials;

Source

User · Answer

smtp Host    smtp gmail com      the host name smtp Port   587    port number smtp EnableSsl   true    whether your smtp server requires SSL smtp DeliveryMethod   System Net Mail SmtpDeliveryMethod Network  smtp Credentials   new NetworkCredential fromAddress  fromPassword   smtp Timeout   20000    Go through this article for more details

User · Answer

This is how it works for me  Hope you find it useful      MailMessage objeto mail   new MailMessage    SmtpClient client   new SmtpClient    client Port   25  client Host    smtp internal mycompany com   client Timeout   10000  client DeliveryMethod   SmtpDeliveryMethod Network  client UseDefaultCredentials   false  client Credentials   new System Net NetworkCredential  user    Password    objeto mail From   new MailAddress  from server com    objeto mail To Add new MailAddress  to server com     objeto mail Subject    Password Recover   objeto mail Body    Message   client Send objeto mail

User · Answer

public static void SendMail MailMessage Message        SmtpClient client   new SmtpClient        client Host    smtp googlemail com       client Port   587      client UseDefaultCredentials   false      client DeliveryMethod   SmtpDeliveryMethod Network      client EnableSsl   true      client Credentials   new NetworkCredential  myemail gmail com    password        client Send Message

User · Answer

mail To and mail From are readonly   Move them to the constructor   using System Net Mail        MailMessage mail   new MailMessage  you yourcompany com    user hotmail com    SmtpClient client   new SmtpClient    client Port   25  client DeliveryMethod   SmtpDeliveryMethod Network  client UseDefaultCredentials   false  client Host    smtp gmail com   mail Subject    this is a test email    mail Body    this is my test email body   client Send mail

User · Answer

Finally got working     using System Net Mail  using System Text           Command line argument must the the SMTP host  SmtpClient client   new SmtpClient    client Port   587  client Host    smtp gmail com   client EnableSsl   true  client Timeout   10000  client DeliveryMethod   SmtpDeliveryMethod Network  client UseDefaultCredentials   false  client Credentials   new System Net NetworkCredential  user gmail com   password     MailMessage mm   new MailMessage  donotreply domain com    sendtomyemail domain co uk    test    test    mm BodyEncoding   UTF8Encoding UTF8  mm DeliveryNotificationOptions   DeliveryNotificationOptions OnFailure   client Send mm     sorry about poor spelling before

User · Answer

Just need to try this   string smtpAddress    smtp gmail com   int portNumber   587  bool enableSSL   true  string emailFrom    companyemail   string password    password   string emailTo    Your email   string subject    Hello    string body    Hello  Mr    MailMessage mail   new MailMessage    mail From   new MailAddress emailFrom   mail To Add emailTo   mail Subject   subject  mail Body   body  mail IsBodyHtml   true  using  SmtpClient smtp   new SmtpClient smtpAddress  portNumber        smtp Credentials   new NetworkCredential emailFrom  password      smtp EnableSsl   enableSSL     smtp Send mail

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

send email by smtp  public void EmailSend string subject  string host  string from  string to  string body  int port  string username  string password  bool enableSsl                try                       MailMessage mail   new MailMessage                SmtpClient smtpServer   new SmtpClient host               mail Subject   subject              mail From   new MailAddress from               mail To Add to               mail Body   body              smtpServer Port   port              smtpServer Credentials   new NetworkCredential username  password               smtpServer EnableSsl   enableSsl              smtpServer Send mail                     catch  Exception ex                        throw new Exception ex Message

User · Answer

This answer features    Using  using  whenever possible  IDisposable interfaces  Using Object initializers Async Programming Extract SmtpConfig to external class  adjust it to your needs    Here s the extracted code       public async Task SendAsync string subject  string body  string to                using  var message   new MailMessage smtpConfig FromAddress  to                        Subject   subject              Body   body              IsBodyHtml   true                                  using  var client   new SmtpClient                                 Port   smtpConfig Port                  DeliveryMethod   SmtpDeliveryMethod Network                  UseDefaultCredentials   false                  Host   smtpConfig Host                  Credentials   new NetworkCredential smtpConfig User  smtpConfig Password                                                await client SendMailAsync message                                                                        Class SmtpConfig   public class SmtpConfig       public string Host   get  set        public string User   get  set        public string Password   get  set        public int Port   get  set        public string FromAddress   get  set

User · Answer

Initialize the MailMessage with sender and reciever s email addresses  It should be something like    string from    codeforwin gmail com      Senders email    string to    reciever gmail com      Receiver s email   MailMessage msg   new MailMessage from  to      Read the full code snippet of how to send emails in c

User · Answer

First go to https   myaccount google com lesssecureapps and make Allow less secure apps true   Then use the below code  This below code will work only if your from email address is from gmail   static void SendEmail                 string mailBodyhtml                 lt p gt some text here lt  p gt            var msg   new MailMessage  from gmail com    to1 gmail com    Hello   mailBodyhtml           msg To Add  to2 gmail com            msg IsBodyHtml   true          var smtpClient   new SmtpClient  smtp gmail com   587       if your from email address is  from hotmail com  then host should be  smtp hotmail com            smtpClient UseDefaultCredentials   true          smtpClient Credentials   new NetworkCredential  from gmail com    password            smtpClient EnableSsl   true          smtpClient Send msg           Console WriteLine  Email Sent Successfully

User · Answer

this would work too    string your id    your id gmail com   string your password    password   try      SmtpClient client   new SmtpClient           Host    smtp gmail com        Port   587       EnableSsl   true       DeliveryMethod   SmtpDeliveryMethod Network       Credentials   new System Net NetworkCredential your id  your password        Timeout   10000           MailMessage mm   new MailMessage your iD   recepient gmail com    subject    body       client Send mm      Console WriteLine  Email Sent        catch  Exception e        Console WriteLine  Could not end email n n  e ToString

User · Answer

Hope you find it useful  it contain too many things      string smtpAddress    smtp xyz com       int portNumber   587      bool enableSSL   true      string m userName    support xyz com       string m UserpassWord    56436578        public void SendEmail Customer  customers                string emailID   gghdgfh gmail com          string userName   DemoUser           string emailFrom    qwerty gmail com           string password    qwerty           string emailTo   emailID              Here you can put subject of the mail         string subject    Registration              Body of the mail         string body     lt div style  border  medium solid grey  width  500px  height  266px font-family  arial sans-serif  font-size  17px   gt            body      lt h3 style  background-color  blueviolet  margin-top 0px   gt Aspen Reporting Tool lt  h3 gt            body      lt br   gt            body     Dear     userName                body      lt br   gt            body      lt p gt            body     Thank you for registering  lt  p gt                        body      lt p gt  lt a href     sURL     gt Click Here lt  a gt To finalize the registration process lt  p gt            body       lt br   gt            body     Thanks            body      lt br   gt            body      lt b gt The Team lt  b gt            body      lt  div gt              this is done using  using System Net Mail   amp  using System Net           using  MailMessage mail   new MailMessage                          mail From   new MailAddress emailFrom               mail To Add emailTo               mail Subject   subject              mail Body   body              mail IsBodyHtml   true                 Can set to false  if you are sending pure text               using  SmtpClient smtp   new SmtpClient smtpAddress  portNumber                                 smtp Credentials   new NetworkCredential emailFrom  password                   smtp EnableSsl   enableSSL                  smtp Send mail

User · Answer

This just worked for me as of March 2017  Started with solution from above  Finally got working     which didn t work at first   SmtpClient client   new SmtpClient    client Port    587  client Host    smtp gmail com   client EnableSsl   true  client Timeout   10000  client DeliveryMethod   SmtpDeliveryMethod Network  client UseDefaultCredentials   false  client Credentials   new System Net NetworkCredential   lt me gt  gmail com     lt my pw gt     MailMessage mm   new MailMessage from addr text  to addr text  msg subject  msg body   mm BodyEncoding   UTF8Encoding UTF8  mm DeliveryNotificationOptions   DeliveryNotificationOptions OnFailure   client Send mm

User · Answer

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 Microsoft TNEF support via MimeKit   Download nuget package from here   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

User · Answer

This     mail To    user hotmail com     Should be   mail To Add new MailAddress  user hotmail com

[c#] Why do I get "'property cannot be assigned" when sending an SMTP email?

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