Thanks Viktor!
El 23/6/26 a las 7:32, Viktor Dukhovni via Postfix-users escribió:
On Thu, Jun 11, 2026 at 05:21:32PM +0200, Victoriano Giralt via Postfix-users
wrote:
Relevant log line:
Jun 11 13:18:46 frontmta postfix/smtpd[1111697]: NOQUEUE:
reject: RCPT from mail.example.net[192.168.0.2]:
550 5.1.1 <[email protected]>:
Recipient address rejected: undeliverable> address:
host backmta.example.com[172.16.3.14] said:
550 5.1.0 <[email protected]>: Sender address rejected:
example.com (in reply to RCPT TO command); from=<[email protected]>
to=<[email protected]> proto=ESMTP helo=<mail.example.net>
The verification probe sender address is chosen by the "verify" service,
which uses "address_verify_sender" and "address_verify_sender_ttl" (if
non-zero) to construct the probe envelope-sender address.
[root@frontmta ~]# postconf -n
address_verify_sender = [email protected]
Perhaps you have some master.cf settings that override the above main.cf
setting (assuming these are from the right Postfix instance).
It was not the case, as seen in the reply that went only to Wietse.
masquerade_domains = $mydomain
masquerade_exceptions = root, postfix, double-bounce
The masquerade_domains setting is a form of wildcard rewriting that
is best avoided. If necessary, rewrite specific valid addresses to
alternative valid addresses via a fine-grained canonica_maps table.
I'll suggest the change to the admins.
virtual_maps = hash:/etc/postfix/virtual1 hash:/etc/postfix/virtual2
Best to use "virtual_alias_maps = ..." and to configure any
"virtual_alias_domains" explicitly in their own setting.
It's most probably some ancient config. I'll suggest the changes
following your advise.
Thanks again for your time.
--
Victoriano Giralt Retired sysadmin
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Note: signature.asc is the electronic signature of present message
A: Yes.
> Q: Are you sure ?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email ?
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