Hi folks,
I recently made my IMail server a gateway for my ccMail Link to SMTP gateway,
and every once in a while, we are getting the following errors when trying to
send e-mail out:
501 <[EMAIL PROTECTED]>... Sender domain must exist
ERR undeliverable 501 <[EMAIL PROTECTED]>... Sender domain must exist
SMTP_DELIV_FAILED
>QUIT
We know the addresses we are sending to are valid. There doesn't seem to be a
pattern as to which messages get this error. I'd say about 99% of our messages
are going through the IMail server. Any help would be appreciated. Thanks.
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