When I wake my computer up from sleep all the Mail and Calendar accounts are offline?

Now that I have upgraded to Mountain Lion, when I wake my computer from sleep all of my Mail and Calender accounts are offline. This includes Gmail, AOL, and iCloud accounts. The connection doctor in Mail says that Mail can connect to the internet but puts red dots next to all of my accounts stating that connections to both the IMAP and SMTP servers could not be made. This issue has shown up only after upgrading to Mountain Lion, and the only way to resolve it seems to be to manually quit and relaunch Mail and Calender at which point everything goes back to normal until I sleep the computer again. Any ideas?

Mac Pro, Mac OS X (10.6), 2x2.8 Intel Quad Core. 2 GB RAM.

Posted on Jul 28, 2012 7:52 AM

32 replies

Oct 25, 2013 2:00 PM in response to Coffeenow NZ

I recently moved out of the house to attend college. I never have this problem while I am at college (different ISP). The problem comes back right away once I am at home, so I would say this definately has something to do with the network DNS or otherwise.

Nov 6, 2013 8:06 PM in response to PhillipUK

After trying all the solutions mentioned in this thread, and finding that none of them worked for me, I pursued the idea that it was caused by the Internet connection being down for some (short) period after the computer (Mac Pro 2008) wakes up. It seems that Mail 6.6 gets into a tizz if it cannot connect immediately to the mail servers.

So I went to Mail's preferences and, in the General pane, set it to Check for new messages Manually. Bingo!

Interestingly, my iCloud accounts still update automatically. I have to initiate checks of my other accounts but I find that less inconvenient than quitting and relaunching the app after each sleep period.

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When I wake my computer up from sleep all the Mail and Calendar accounts are offline?