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- Maybe in reply to: Brad C: "Sender Verification"
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From: Wietse Venema (no email)
Date: Fri Jun 01 2007 - 09:23:21 EDT
Brad C:
> Hey There,
>
> Im not sure if im on the right track, with sender verification in my mind it
> would be logical to do a MX lookup of the domain in the " mail from: "
> field, connect to that server and do a check that way too see if the user
> exists, but I think postfix is in my instance is connecting the the exact
> same server that is connecting to it,
Please do not spread false information.
Postfix sends a SEPARATE email message into the mail queue, and
then connects to the mail server(s) of the sender's domain.
To find these messages, search the maillog file for
$ grep status=deliverable /var/log/maillog
$ grep status=undeliverable /var/log/maillog
Only broken servers connect to the SMTP client for verification.
Wietse
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