Currently Being ModeratedSep 30, 2012 9:45 PM (in response to ArthurAJ)
In my case the mail resides on an Xserve in my home. I access it through IMAP. I have dynamic DNS with an MX record. The Xserve also runs DNS and resolves "imap.myip.net" to the internal IP address of the Xserve, and, when I am and work, "imap.myip.net" resolves to the outside IP address I have through my provider. My router forwards external requests on Port 993 to the Xserve internally.
Until recently, I could move between home and work and access my email without problems in either place. It apperas that since the 10.8.2 update, I can no longer access my email from home, where I am directly on the network hosting the IMAP server. Mail accesses external email servers (Gmail and my work account) without problems.
I think, we are dealing with the same problem.
I just fired up my work VPN, and, sure enough, messages are trondling into Mail.
Before the Mail Connection Doctor stated that the IMAP server could not be contacted, when I could clearly ping it.
Even before the update I found that I had to relaunch Mail when I returned home from work, or Mail couldn't connect to the mail server. It seemed like Mail chached the resolved IP address it had gotten at work, which is the external IP address of my home network, and failed to re-resolved the address of the IMAP server once I woke up the computer, after getting back home. Quitting Mail and relaunching it did resolve that, but was annoying.
Currently Being ModeratedOct 1, 2012 8:01 AM (in response to D. Hoffmann)
I don't know that we're having the same problem or not. When I take my laptop home with me and use my own Comcast cable network with an Airport Time Machine, I can access all my email addresses no matter which of the two domains I'm using. But when I go back to my office, I can only use the one domain and not the other. That's why I wondered if it had to do with my Airport or if it could be some other problem. Obviously the settings on my computer have remained constant whether I'm at my office or at my home.
I also had a mixture of IMAP and POP accounts. I wondered if something was going on with the IMAP and decided to change every email address to be a POP account. But that doesn't make any difference. The action is still the same: I can access one domain's email but not the other at my office and both domain's email at my home.
Currently Being ModeratedOct 1, 2012 9:33 PM (in response to ArthurAJ)
It looks like a simple reboot fixed the problem.
Mac OS X is, by and large, so stable that I don't even consider rebooting as a troubleshooting step. There have been a number of application glitch that required a quit and re-launch to fix them, but that didn't do the trick with Mail. Very possibly reconfiguring everything from scratch had something to do with the fix, but in a way that required it to be combined with a reboot.
Currently Being ModeratedOct 1, 2012 10:11 PM (in response to D. Hoffmann)
I'm glad it worked for you. For me. . . it didn't. I've always tried rebooting when a problem seems beyond the troubleshooting steps I've followed. My confidence isn't a great as yours in that regard.
But, I even tried a complete reconfiguring from scratch and rebooting. But the problem continues.