Authentication failure (with log)

[Ron]

Here's a log of a successful mail sent via smtp.mail.yahoo.com (the asdf is where I removed their hashes) :

READ> 220 smtp104.mail.sc5.yahoo.com ESMTP
SENT> EHLO rockinron
READ> 250-smtp104.mail.sc5.yahoo.com
250-AUTH LOGIN PLAIN XYMCOOKIE
250-PIPELINING
250 8BITMIME
SENT> AUTH login
READ> 334 asdfasdfasdf
SENT> asdfasdfasdfasdfasdfasdf
READ> 334 asdfasdfasdf
SENT> asdfasdfasdf
READ> 235 ok, go ahead (#2.0.0)

Here's a log showing a failed attempt to send an email from a GoDaddy.com hosted account:

READ> 220 pre-smtp08-01.prod.mesa1.secureserver.net ESMTP
SENT> EHLO WINHOST37
READ> 250-pre-smtp08-01.prod.mesa1.secureserver.net
250-PIPELINING
250-SIZE 31457280
250 8BITMIME

I'm not able to send mail through a GoDaddy.com website using System.Web.Mail either.

Is this a DotNetOpenMail issue or a GoDaddy issue? Should DotNetOpenEmail be able to understand those 250 codes?

Thanks,
Ron

[Ron]

The exception message is:

504 Unrecognized authentication type

[Mike Bridge]

It looks like the server's response doesn't include any information on what AUTH protocols it supports.  I should probably set the default to be LOGIN. 

Do you know if GoDaddy's servers use LOGIN authentication?

[Ron]

When I unset the SmtpAuthToken:

/*
smtpServer.SmtpAuthToken = new SmtpAuthToken(
ConfigurationSettings.AppSettings["SmtpLogin"],
ConfigurationSettings.AppSettings["SmtpPassword"]);
*/

The mail sent ok.

The problem was that I was sending a username/password when the mail server wasn't requiring one. I suppose that's my own fault...