what is exim exactly doing when it does a verification of the sender? I
get the following message:
550-Verification failed for <userpart@???>
550-Unrouteable address
550 Sender verify failed
userpart@??? is just an example, the address used in realitity
does really exist, the mailserver is reachable from the mailserver and I
can't see any error. Exim doesn't tell me more detailed what is failing.
Is it doing a callback automatically? I just have "verify = sender"
without any additional options in the configuration. If it does: What is
exim using for "EHLO ???" and "MAIL FROM: ???" before it can do "RCPT
TO: userpart@???"?
