Daniel Hopkirk - RandomInsanity:
> However out of curiosity as much as clutching at straws I cleared the
> verify cache and restarted postfix. After a couple of test emails it now
> appears to be refusing the email instantly as expected. My best guess
> would be that the invalid test address I was using has been accepted at
> some point in my configuration tweaks, and based on the docs referencing
> its optimistic caching it may have been operating on that previous accept?
> Does this sound like a valid interpretation?
Note that Postfix did send out an address probe (the thing that
ended with "status=undeliverable" and "User unknown").
Normally, Postfix will refresh (send a new probe) a "good" cached
address when it is older than 7 days.
address_verify_positive_refresh_time = 7d
So unless you have been doing these experiments for a week,
I would not buy your argument.
Wietse
