On Tue, Mar 05, 2013 at 11:19:22PM +0100, Michiel Hazelhof wrote:
> which results in a reject, Mail.log: Mar 5 21:55:30 black-mail
> postfix/smtpd[19444]: NOQUEUE: reject: RCPT from
> domain.nl[2a00:d10:101::26:0]: 554 5.7.1 <al...@hazelhof.nl>:
> Recipient address rejected: Unknown user; from=<i...@domain.nl>
> to=<al...@hazelhof.nl> proto=ESMTP helo=<domain.nl>
Nothing in Postfix generates an "Unknown user" response of any kind
(the string "Unknown user" does not appear in the Postfix source
code). Even such a string were returned it would not be with a
"5.7.1" DSN code, which indicates site policy not address validity.
Perhaps you have a milter or policy service that generates this
response.
--
Viktor.
