outgoing mail server stopped working

First of all, I'm not "Apple." These are user forums set up and run by Apple.

Welcome to the best thing about being a Mac users. The community of users helping users.

The obvious thing to ask is if the service changed their outgoing mail server name. Did they say what it should be? You can verify it in Mail's Preferences, in the Account tab. While you are there, make sure your user name and password are correct.

If those are correct and confirmed, there are other things to try.

I am having an issue with sending email out atm as well. Could you tell me LAM if the problem is non stop or only occasionally?

For me I keep getting a message telling me the outgoing server is not available and would I like to try again later. I have several smtp severs setup to deal with the different networks I join so I also get the option to use another server. Without being connected to those networks it will not work however.

I found if I just close and reopen mail the message will send. Its real annoying as its only just started for me in the last week or so.

I have a Mac Book Pro with 10.4.10 osx. I have tried removing the server settings and replacing them and also the disk utility to verify and repair permissions. I see people having trouble with email on iphone and wonder if there is some trouble with the latest update.

I have also confirmed my isp has not changed its smtp settings. Overall mail is still working, just not how it should be 😟

Message was edited by: SuRgEn

Hey guys, try this little fix... Open Mail, click "Mail" from the top menu bar and open "preferences", click the "Accounts" tab from the top of Mail preferences, click the "Account Information" sub-tab, click "Server Settings" at the bottom of this pane, change the "Server Port" number to 587, close preferences, quit Mail, reopen Mail and now you should no longer have issues with your outgoing mail server.

hmm changing the port to that stop mail from sending altogether.

Okay, are you having this issue with your ".mac" e-mail account, or is it with a different, POP3 or IMAP, e-mail account that you have set up through "Mail" ???

Try showing your account settings, server settings and advanced settings to help weed out the problem.

I usually search the net to find answers on mail setting. Roadrunner should have something about what they consider to be correct.
I frequently had the same problem with one of my account. After doing what you did I found all that was necessary was to edit then add to the Outgoing Mail Server list. Those options appear when you click on the double arrow.
All this stopped with adjusting Advanced settings, and the port set to 110. Using SSL may or may not have to to checked, depending on the server. For me it was trial and error.
Example: GMail recommends the port set to 995 with SSL.

See... Didn't I "guess" the solution in the very first response post? 🙂 Just joking around. Glad you fixed it and it wasn't anything complicated. It must be in their tech support manual, "If Mac, pass buck to Apple."