(Wdevs) System.Web.Mail and smtp.gmail.com

2005-01-14 #code-snippets,#c-sharp,#qc,#wdevs

Important update: there is another snippet to use smtp.gmail.com with System.Net.Mail for .NET 2.

Since I had difficulties to find examples on Google, I publish my code that uses smtp.gmail.com as smtp server to send emails.

public string sendMail (string from, string to, string cc, string bcc, string subject, string body) {

  // Mail initialization
  MailMessage mail = new MailMessage();
  mail.From = from;
  mail.To = to;
  mail.Cc = cc;
  mail.Bcc = bcc;
  mail.Subject = subject;
  mail.BodyFormat = MailFormat.Text;
  mail.Body = body;

  // Smtp configuration
  SmtpMail.SmtpServer = "smtp.gmail.com";
  // - smtp.gmail.com use smtp authentication
  mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
  mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "myemail@gmail.com");
  mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "mypassword");
  // - smtp.gmail.com use port 465 or 587
  mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", "465");
  // - smtp.gmail.com use STARTTLS (some clients call this SSL)
  mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");

  // Mail sending
  try {
    return "";
  } catch (Exception ex) {
    return ex.Message;

In addition, two useful links:

Unfortunately this code doesn’t function under mono:

Server reponse: '530 5.7.0 Must issue a STARTTLS command first';Status code: '530';Expected status code: '250';Last command: 'MAIL FROM: '