Unable to send mail using MobileMe after upgrading

I hope your option helps others. I actually tried it before digging deeper. For some reason editing the port in the "edit smtp server list" route did not work in my situation. Even though I changed the port in this preference panel, I beleive the plist file was not changed. I'm glad it worked for you and I would suggest doing it your way first before doing anything more complicated.

It worked for me too! magyarmerce, thanks a lot!

Has not worked for me. The phrase "LastSuccessful" does not appear in that file on my machine.

Concur with the others: brilliant fix. Thanks!😎

Connecting to SMTP.me.com stalls, but smtp.mac.com does not. I did try selecting TLS certificates in Mail preferences but no change. I have an IMAP and POP account because if I delete my POP account I will lose (yes, with ONE S.....pet peeve) years of mail. My IMAP account seems to keep about a weeks of mail visible. Perhaps I dont know how to use it properly.

I have tried all of the fixes, reinstalled the account and it lasts momentarily. I think it needs an OS update.

This worked perfectly. I'm not sure if the switch to iCloud is going to fix some of this, but crazy.

Wow! Worked like a gem. Thanks so much.

This is how you fix this without worrying about ports and authentication and all that stuff that confuses people:

1. Open Mail.app, go to Mail > Preferences > Accounts, select any MobileMe IMAP account, and click the minus at bottom of column to delete it.

2. Quit Mail.app. To make sure it is actually quit, go to  > Force Quit. Force Quit Mail.app.

3. Go to  > System preferences > Mail,Contacts,Calendars. Make sure your MobileMe account is on left side, select it, then check mark Mail & Notes on right side. Wait for it to stop spinning.

4. Re-open Mail.app, and send yourself an email. Your MobileMe mailbox will be repopulating, so it may take longer for the initial sending test to process.

I have tried this no less than a dozen times over the past few days. It works for about an hour at best, and then the problem starts again.

This is ridiculous and Apple should be embarassed and ashamed. The probelm has not been fixed in 10.7.1, this solution is just a temporary bandaid at best.

Oh, you are GOOD! I had tried setting the port taking the "edit SMTP server list" in the pull-down menu route, but that didn't work. I edited the port number in the Accounts.plist, saved it, restarted mail and all sorts of queued stuff started blasting out of my account.

Many thanks to you.

Well I just did that on my MacBook Air and still it's offline. The Air is the only computer I upgraded to Lion and my iMac is still on Snow Leopard and working fine. my phone is still on iOS4.

I'm not 'upgrading' anything else to Lion. I don't like it much anyhow!

Logged in to say deleting the second email account and leaving the .me account seems to have worked for me. I had already tried deleting and recreating the apple mail account but that didn't help. So far this one has. (Using snow leopard btw.)

cheers!

I had the exact same problem. Even the blasted error message that shows up for a fraction of a second. Thanks for the fix man! Lion has been a headache for me. I didn't even upgrade. I got a brand new Mac Mini Server.

Unfortunately I have the same problem. None of the above has worked for me. I have tried eliminating all my accounts and readding them. I have changed outgoing ports to 587.

My mail is simply stuck in the outbox. I do continue to receive mail.

help!

Seems there are all kinds of problems with Lion... I had one that was identical with the one describe. Captureed (film) the sequence with my iPhone in order to see the dialog...