Mail can't recognise legit server

[andersond2n]

I've had my Macbook for the past 3 weeks.

When I set up Mail, I gave it the correct incoming and outgoing mail server details. It worked fine for a day or so, then suddenly decided it "could not send mail using the (named) server".

What I can't understand is, the incoming and outgoing mail server address is the same. I can receive emails, but Mail can't send emails.

 

[MisterMe]

You have an SMTP server issue. These have been addressed too many times to count on this forum. A simple search on SMTP should give you the help that you need.

 

[poolvibe]

May be DNS. Try and use the actual ip addys or the nameserver (above the domain) PM me if you would like to troubleshoot this. Happy to give it a shot.

 

[r.j.s]

Maybe the SMTP server requires authentication?

 

[JediMeister]

More likely than not it's the port number. With the 10.5.5 update Mail automatically tries sending using the default ports used by email providers of 25, 465, and 587. If you are running 10.4, access your Mail preferences, go to Accounts, hi-light the affected account and click on the Server Settings button in the Account Information tab next to where it says Outgoing Mail Server (SMTP). Change the port number manually, retry.

 

[ebel3003]

If it worked before, this may not be the issue, but perhaps your ISP has decided to block third-party SMTP servers.

Like poolvibe said above, though, you should try using the actual IP address in place of the domain name in your settings. Furthermore, verify that your SSL and port settings are correct, and that you are not trying to connect on a port that your server is not configured to use.