Larry Vaden:
> Thanks for your help in advance.
>
> Situation: trying to bring up a postfix box to act as inbound relay to
> protect WinDoze box running several small domains; using
> reject_unverified_recipient as last line in
> smtpd_recipient_restrictions.
>
> What causes
>
> NOQUEUE: reject: RCPT from host.example.org[nnn.nn.nn.n]: 450 4.1.1
> <nosuchemailaddress AT example DOT com>: Recipient address rejected:
> unverified address: Address verification in progress;
>
> particularly the "Address verification in progress;" part?
It means that even Postfix cannot beat Einstein. It is subject to
the same law of the speed of light as all the other mail systems.
> 20 to 30 seconds later there's another log entry:
>
> postfix/smtp[3575]: 9D34D213C035: to=<nosuchemailaddress AT example DOT com>,
> relay=mail.example.com[nnn.nnn.nn.n]:25, delay=149, delays=0/0/32/117,
> dsn=2.0.0, status=deliverable (250 ok deliver to alternate)
So it took longer than 6 seconds that the Postfix SMTP server is
willing to wait for the verification result to arrive.
Wietse
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