Mail accounts connection failed in Mountain Lion

Same problem except it also causes Safari to stop searching and accessing websites. Also every other app I try to launch fails. I have restarted the machine multiple times but after a while it seems to lose network access.

The machine has become unusable, so I'm using myipad to write this.

Anyone? Apple update?

It seems to correct its self after my computer is on for a long time. Like more than 5 or 6 hours without sleeping.

My iCloud mails came through and sent out fine, only from yahoo was the problem. So I just created another account with gmail and linked it to the Mac Mail which everything works fine. For the mails from yahoo, It looks like all the mails came through. But if there is no new mail and I press 'Get new mail message' icon, it would give me the connection error.

After some testing and deliting of preferences from the User Library folder Mail hung again. So I went and deleted every Preference from the folder. I've been running without any issue for a couple of hours.

Did it stay that way until now? I've tried deleting all references I could find to Mail preferences and cache, along with Messages (I have the same kind of problem with it), but no joy. It's been incresingly annoying and it's very upsetting that we never got any word from Apple on this. I'm very close to trying a clean install, but I'm actually worried that it won't fix the issue. I don't think I'll be able to "keep calm" if that happens. Has anyone heard if clean installs have this issue?

Haven't heard of any success with a clean install. The only interesting thing that I have to offer is mine has appeared to have fixed its self. I haven't had any issues over the past week or so, and I didn't do anything to try and solve the problem. I was just going to live with it until apple issued an update to fix the issue. This really only furthers my confusion though as to what the issue actually is, being that it seems to have resolved it's self.

Add me to the list. It's happening on both my Macs and started immediately on both after upgrading to Mountain Lion. It seems to be related to sleep. I have a 3rd Mac where it has never happened, but I have its sleep turned off (I turned it off because the dock would stop working after waking up from sleep ... another issue ...).

This is clearly a bug which I hope has been addressed in the .1 release coming soon. Though I noticed that a .2 was just distributed to developers, so maybe it was caught late?

Same here. After upgrade from lion to mountain lion mail accounts (imap > pop, most smtp) go offline after wakong my mac pro from sleep. Upgrade 10.8.1 does not change this odd behaviour. As I heard from a friend with 10.8.2 this won´t help to.

Did anything: flush cache, repairing rights incl. "Restting home directory permissions and ACLs", deleting prefs, resetting accounts etc. - nothing helps.

Quitting Mail and restart: everything is fine until next awakening from sleep.

Please Apple: help stopping this.

Sincerely

Heliophon

--

Mac Pro 2008, 2x2,8 GHz,14 GB, 10.8.1

Well, this is odd, but it looks like the issue is revolved or at least much rarer for me. I can't for the life of me figure out how this happened, since I'm sure I didn't make any configuration changes after the last time. Maybe a reboot effected an earlier change I might have tried, but I couldn't pinpoint it. I'm also positive it got better before the update, although I'm not sure if it ever happened again after 10.8.1.

I have just gotten a new iMac running 10.8, I can receive email, but cannot sent. Takes 30-45 seconds to send a simple outging email, if there's an attachment, it never sends AT ALL, just reaches a point where I'm told it couldn't connect to the outbound server.

The only way I CAN send attachments is by using Firefox . . . Safari doesn't work either.

6 hours on the phone yesterday between Apple and ATT tech support . . . .I'm very angry and frustrated...

I've solved my issue like this, and it was a bit trial and error as I'm not a computer expert.

What had happened is that my .me address (iCloud) was somehow using the same outgoing server as another account.

You may like to try what I did, but no guarantees ...

1 Go to Mail > Preferences

2 Go to Accounts

3 Select iCloud IMAP

4 The Account Information tab should be selected. Near the bottom of the pane, look at Outgoing Mail Server. It should say iCloud. If not, click on the arrows and select iCloud.

5 Click on another account (vertical list on left side of window) and a window will appear prompting you to Save. Save!

6 Click on Composing (Sixth icon at top of window). Half way down there is a "Send new messages from...". Click on the arrows to select the default account from which you wish to send messages.

7 Click red button to close.

Send a test email to yourself with the Subject Test and the time, ie Test2240.

This worked for me!

Regards

Will

Note that after I did this, my main mail account (not iCloud) was showing "0 Messages, 3 Unread" with no messages in view. I got round this in the main Mail Viewer window by clicking on Inbox in the left hand column, then going up to "Mailbox" in the menu at the top of the screen, and clicking Rebuild.

Will

Mine is having this problem as well, as I mention here with more details and pics: https://discussions.apple.com/thread/4268728?answerId=19512998022#19512998022

Same problem here.....No fix yet???????????

Be sure to check your antivirus to ensure that's not causing the problem. I had a similar problem and it turned out to be my Avast! antivirus and internet security that was causing the problem. I disabled the File System Shiled, Mail Shield, and Web Shield, gave Mail another try, and it was good. Things were also good after I renabled the Shields in Avast!.