Hi, I did what you have said.
Below is the log I got (edited server and machine details in the log)
2012-06-12 20:06:38.736 Opening log file.
2012-06-12 20:06:38.816 INFO Smtp(1)[9] Info: Connecting to XX.X.XX.XX:25 using Smtp 2.0.4444.0 (trial version).
2012-06-12 20:06:38.831 DEBUG Smtp(1)[9] Info: Connection succeeded.
2012-06-12 20:06:42.689 INFO Smtp(1)[9] Response: 220 ************
2012-06-12 20:06:42.696 INFO Smtp(1)[9] Command: EHLO md-XXXXXXX
2012-06-12 20:06:42.698 INFO Smtp(1)[9] Response: 250-XXX.XXX.com
2012-06-12 20:06:42.898 INFO Smtp(1)[9] Response: 250-PIPELINING
2012-06-12 20:06:42.898 INFO Smtp(1)[9] Response: 250-SIZE 10485760
2012-06-12 20:06:42.898 INFO Smtp(1)[9] Response: 250-ETRN
2012-06-12 20:06:42.898 INFO Smtp(1)[9] Response: 250-XXXXXXXA
2012-06-12 20:06:42.898 INFO Smtp(1)[9] Response: 250-ENHANCEDSTATUSCODES
2012-06-12 20:06:42.899 INFO Smtp(1)[9] Response: 250-8BITMIME
2012-06-12 20:06:42.899 INFO Smtp(1)[9] Response: 250 DSN
2012-06-12 20:06:42.931 ERROR Smtp(1)[9] Info: Rebex.Net.SmtpException: None of the supported authentication methods is accepted by the server.
at Rebex.Net.Smtp.Login(String userName, String password, SmtpAuthentication method)
I tried using this method(smtp.GetSupportedAuthenticationMethods()) to get the supported authentication methods by the server. I am getting 0 items in the collection.
SMTP server is working fine to send email with my network credentials using System.Mail API.
Thanks,
gogul