Gordon, but I don't get ANY bounces at all....I can't imagine everybody's
servers incompatible....what about when the address is outdated and there is
no recipient server?
There are two possible sources of a delivery failure notice. Most common
would be your own server. If you send an email to a non-existent email
address, and the remote server refuses to accept delivery, your own SMTP
message submission server should return it with a failure notice.
Less commonly, the remote server will accept email for delivery, then
determine that it is not deliverable. If your return email address is valid,
that server might send a delivery failure notice (if it is willing to risk
being blocked for "backscatter"), or it might not (if it is properly
configured to reduce the risk of "backscatter").