Troubleshooting Connection Errors
If you are having difficulty connecting to our mail server or
sending/receiving email, please verify the following settings are
correct in your mail client.
In Outlook, navigate to Tools -> Account Settings, then double-click on your email address in the new window.

Verify that the incoming and outgoing mail servers are both set to "mail.yourdomain.com," where yourdomain.com is the name of your website, and your username is your full email address (user@domain.com).
Click
"More Settings" and click the "Outgoing Server" tab. Verify "My
outgoing server (SMTP) requires authentication" is checked and "Use same
settings as my incoming mail server" is selected.

Click
the "Advanced" tab. Verify the Incoming server (POP3) port is set to
110, SSL encryption is unchecked, and the Outgoing server (SMTP) port is
set to 25. If you are having trouble sending email, try setting the
SMTP port to 2525.

Article ID: 5, Created On: 4/26/2011, Modified: 6/15/2011