can't send mail - smtp.live.com server issue

Sounds like you may have to delete some setting storage files with the MBA mail program. Does your model have 'Time Machine'?, have you used 'Time Machine'?; if yes you may be able to restore the mail application. Also, did you contact your mail service to see if there are issues with Apple devices?

Try: http://forums.macrumors.com/showthread.php?t=315582

Thanks for the screenie.

I'm not sure but try this: HERE

and HERE (probably same tip)...this one might work: HERE

I also have exactly the same problem with Mail v4.5 on Mac OS X 10.6.8. I can receive mail, but cannot send. This started barely this weekend (Saturday, March 30). Any ideas on what to do?

I think I just fixed it! Seems Mail changed (for no reason) the Advanced preferences in Accounts. AT&T server was full. All I did was go to Mail Preferences, select the account and under Advanced - Remove copy from server after retrieving a message, I selected to Remove Now and set it to delete After one week and voila!!

All is fine and dandy! 🙂

I have exactly the same issue on OSX LION. I cannot get the mail app to send using my ISP's SMTP mail server (smtp.xs4all.nl). It works on my MBP, IPad and iphone but not on my imac. It used to work and out of the blue stopped working. I tried different settings, SSL on/off different port numbers, deleting the mail cache etc etc. No joy. i turned off my firewall for testing, no joy. i reinstalled LION and again no joy. if I setup a email account with the same settings in Entourage it works fine. Sparrow fails. I can telnet to the SMTP server. Other SMTP servers work fine in MAIL. The only difference I can find between my MBP and IMAC setup is that my MBP is on an earlier build of MAIL. My imac uses mail 5.2 - 1278. If anybody has any idea's please let me know.

I have the exact same issue. - Im using Lion. the problem started this week when returning home from Amsterdam and Paris. I can receive Gmail but not send. I can send and receive Gmail from Safari. Mail is not sending. Tried editing the SMTP server list multiple times, checking the ports, running Telnet etc. everything should be working. I called my ISP also to see if they could see anything... everything's 'green' on their end. The only thing I haven't done is delete mail and re-install.

Same problem, i cure this by having to enter the network providers smtp every where I go, its a bloody nusance! So every where i go I have to demand the network providers smtp, it can be a bit imbarrasimg as often the it guy will not give it for security reasons. This is the message i get on my 3gs through all the ios versions - the recipient johnapplemailiscrap@seed.com was rejected by the server because it does not allow relaying, and it's the same problem on my MBPR 10.8.1. Please some one, please solve this.

Thanks mate! That worked for me although I don't understand whats that setting all about! Cheers