ATT.com mail isn't all being delivered
I have a very long standing email address to which I forward 2 other accounts to. There are times when 1, 2 or all 3 of them won't receive certain messages. I have run tests from other email addresses to all 3 at the same time only to find that none, or 1 will receive the email. I have had multiple complaints that I did not reply to a message. This is on the web login version in addition to my phone. They are not in spam/junk... they are flat out missing. What do I do? reading the forums, it seems this is not an isolated event. I don't want to abandon my longest standing account, but I also can't afford to miss messages. What could be happening?