Kind of an Exchange novice. A few days ago one of my users had email to two domains returned to him. I had another user today with the same issue. If I track the email through message tracking the last message I see is:
"message transferred to postini through smtp"
Part of the returned email error is:
"Could not deliver the message in the time limit specified. Please retry or contact your administrator.
We have a third party doing our spam filtering, but they've told us they are doing nothing with outbound mail. I did a bit of research and learned that Postini is a spam filtering product. It also looks like error 4.4.7 is an indication of a problem with the receiving server. Do the above messages/errors mean my users mail is reaching the remote mail server and then being rejected?