Hello Viktor,
thanks for the explanations.
When creating the e-mail using
echo “Test email (virtual domain)” | /usr/sbin/sendmail root
Is not taken into account in the subsequent configuration of virtual
domains /etc/aliases:
virtual_mailbox_domains = lmdb:/etc/postfix/virtual_mailbox_domains_maps,
proxy:mysql:/etc/postfix/sql/mysql_virtual_domains_maps.cf
virtual_mailbox_maps = lmdb:/etc/postfix/virtual_mailbox_maps,
proxy:mysql:/etc/postfix/sql/mysql_virtual_mailbox_maps.cf,
proxy:mysql:/etc/postfix/sql/mysql_virtual_alias_domain_mailbox_maps.cf
virtual_alias_domains = lmdb:/etc/postfix/virtual_alias_domains_maps
virtual_alias_maps = lmdb:/etc/postfix/virtual_alias_maps,
proxy:mysql:/etc/postfix/sql/mysql_virtual_alias_maps.cf,
proxy:mysql:/etc/postfix/sql/mysql_virtual_alias_domain_maps.cf,
proxy:mysql:/etc/postfix/sql/mysql_virtual_alias_domain_catchall_maps.cf
virtual_transport = lmtp:inet:dovecot.tachtler.net:24
In this example, all lmdb are empty (but prepared), but converted to
lmdb format with postmap - but there is no evaluation of /etc/aliases.
-----
Apr 21 06:16:06 server postfix/pickup[1076]: 619E4180084: uid=0 from=<root>
Apr 21 06:16:06 server postfix/cleanup[1146]: 619E4180084:
message-id=<[email protected]>
Apr 21 06:16:06 server postfix/qmgr[1078]: 619E4180084:
from=<[email protected]>, size=287, nrcpt=1 (queue active)
Apr 21 06:16:06 server postfix/lmtp[1154]: Verified TLS connection
established to dovecot.tachtler.net[fd00::10:10:0:0:80]:24: TLSv1.3 with
cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519
server-signature RSA-PSS (4096 bits) server-digest SHA256
client-signature RSA-PSS (2048 bits) client-digest SHA256
Apr 21 06:16:06 server postfix/lmtp[1154]: 619E4180084:
to=<[email protected]>, orig_to=<root>,
relay=dovecot.tachtler.net[fd00::10:10:0:0:80]:24, delay=0.17,
delays=0.06/0.04/0.03/0.04, dsn=2.0.0, status=sent (250 2.0.0
<[email protected]> Od6tMYXGBWj4AwAAhuu2+w Saved)
Apr 21 06:16:06 server postfix/qmgr[1078]: 619E4180084: removed
-----
Thanks and regards
Klaus.
On 4/20/25 09:18, Viktor Dukhovni via Postfix-users wrote:
On Sun, Apr 20, 2025 at 09:02:43AM +0200, Klaus Tachtler via Postfix-users
wrote:
I have a question of understanding:
If virtual_alias_maps is configured and working successfully and an email
address is defined in /etc/aliases to forward the emails of the root user,
the configuration from /etc/aliases is NOT evaluated anymore.
No, use of virtual(5) aliases (on input during queue file creation) does
not in any preclude additional later use of local aliases(5) during
message delivery, when the recipient domain or full recipient address
resolves to a transport handled by the local(8) delivery agent,
typically when the recipient domain is listed in $mydestination.
/etc/aliases (relevant excerpt)
# Person who should get root's mail. Don't receive mail as root!
# Tachtler
# default: #root: you
root: [email protected]
If, after any rewriting on input the final recipient is
"[email protected]" and "local.example" is listed in $mydestination,
the transport table directs "[email protected]" to a local(8)-based
transport, then the above alias would redirect the mail to
"[email protected]".
That said, precisely this sort of address-to-address redirect is much
better (more efficiently and reliably) done via virtual aliases.
An email generated locally as follows would be delivered to the user
[email protected] and not to the user [email protected] as expected?
If the local(8) delivery agent is bypassed, or $alias_maps is not set to
point to that file, or "newaliases" has not been run, ... then perhaps
the alias would not take effect.
--
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Homepage: https://www.tachtler.net
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