Emmett Culley via Postfix-users:
> We have a web app we use to find bad email addresses after a
> newsletter goes out. We read the mail queue using postqueue -p,
> the parse the output of that command to get a list of emails that
> failed to successfully send.
That will only give you *SOME* of the failed addresses.
To get information about ALL delivery attempts, you MUST process
the MAIL LOG FILE.
https://www.postfix.org/DEBUG_README.html#logging
The output of the postqueue command:
- Does not show the recipients that have an invalid address (user
unknown) or that are over quota, etc. Those failed recipients are
NOT kept in the queue.
- Does not show a 'reason' for a failing recipient while Postfix is
busy trying to deliver the message to that recipient.
You really should look in the log.
Wietse
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