[Mono-list] Exception When Using System.Net.Mail

Kenneth H. Brannigan kbrannigan at vitruviansolutions.com
Sun Dec 2 22:36:41 EST 2007

I am getting the following exception when using System.Net.Mail in  
mono 1.2.4_4:

Unhandled Exception: System.Net.Mail.SmtpException: 500 5.5.1 Command  
unrecognized: "AUTH LOGIN"
   at System.Net.Mail.SmtpClient.Authenticate (System.String Username,  
System.String Password) [0x00000]
   at System.Net.Mail.SmtpClient.PerformAuthentication () [0x00000]
   at System.Net.Mail.SmtpClient.Send (System.Net.Mail.MailMessage  
message) [0x00000]
   at MonoTestConsoleApplication.Program.Main (System.String[] args)  

Here is the code:

	    System.Net.Mail.MailMessage message = new  
System.Net.Mail.MailMessage("admin at test.com", "sent at test.com");
             message.Subject = "Test From Mono";
             message.Body = "<b>THIS IS COOL</b>";
             message.IsBodyHtml = true;

             System.Net.Mail.SmtpClient server = new  
             server.DeliveryMethod =  

When I run the following code using the old System.Web.Mail namespace  
it works perfectly:

	    System.Web.Mail.MailMessage oldMessage = new  
             oldMessage.To = "sent at test.com";
             oldMessage.From = "admin at test.com";
             oldMessage.Subject = "OLD MONO";
             oldMessage.BodyFormat = System.Web.Mail.MailFormat.Html;
             oldMessage.Body = "<b>THIS IS COOL</B>";

             System.Web.Mail.SmtpMail.SmtpServer = "localhost";

Any help will be very much appreciated.

Kenneth H. Brannigan

Vitruvian Solutions®, LLC
Mobile: 201.602.6542
E-mail: kbrannigan at vitruviansolutions.com
Web: www.vitruviansolutions.com

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