We currently use Rebex Secure Mail, but are finding that it cannot authenticate to Google Postini for sending mail via SMTP with the simple code:
Smtp smtp = new Smtp();
smtp.Send("from", "to", "subject", "body");
The exception we get from the Login method is:
Rebex.Net.SmtpException: None of the supported authentication methods is accepted by
However, when we use the System.Net.Mail.SmtpClient it works without a problem. What can we do with it?