Subscriber says he is getting messages, but his posts are rejected.
This can happen when the Subscriber is receiving email at one address but trying to send from another. The From: address must match the address on the Mailing List exactly.
Maybe Joe's employer made the change without Joe realizing the difference. His old email address is forwarded to his new address, while all new emails from him are sent from the new address.
We have instructions to help resolve this issue.