Why is this not mentioned somewhere in the updates on here, or the main page where you log into your account? I'm quite annoyed, I've spent quite a while trying to find out why my sites wont send email, sending test messages, and so on. A simple email would have been nice so we knew why it wasn't working.
I have a problem with PHP mail affecting 3 different accounts, none of which send spam. In fact one of them, my blog, only ever sends emails to me, at my own domain, so cannot have been reported for spamming. I've just sent in a message to support to try and found out what the problem is.
I'm not impressed simply because I've had to repair all the settings for my forum to get it to work, the google side of it hadn't even occurred to me till you said! I'm not happy at all.