I admit, I'm not much of a Mac user, so please bear with me on what might be a "silly" question. I've been browsing and Googling this issue and have yet to find a reasonable answer.
Someone I know was having issues with her email. She has three devices; iPad, iPhone and MacBook Pro. Her email is via POP. All three had been working just fine until she returned from a short vacation, when her email was _retrieving_ just fine with the iPad and iPhone, but not her MacBook. She could send emails via the MacBook without any problems, and I found the option to check connection in Apple Mail (connection doctor, I believe it's called?) which showed all authentication was going through just fine, so I could rule out bad password (she'd changed her iTunes password while on vaca). But no matter what we did, she couldn't receive emails on the MacBook. Oh, and of course I verified that she had the correct mail server info and credentials, which were all set as she hadn't touched the device quite a few days.
I verified that her Apple Mail was set to leave messages on the server for 30 days, and checked her POP settings on the iPhone and iPad (info from http://support.apple.com/kb/HT3228) to ensure they were doing the same. All were. Then, on a whim, I powered down her iPad and iPhone. That did the trick. A week's worth of emails just leapt into her inbox.
Now, this has me curious. While I don't often support users who use Macs or iDevices, it has tweaked my interest on what might be the cause. Has anyone else run into this, or is there a readme on the subject? I'm sure someone will ask me for assistance with these things as more and more friends and family are iPhone and iPad users.
Thanks in advance for any help.