Adam Weremczuk via Postfix-users skrev den 2025-02-19 15:26:
Now, how do I restrict this relay to only be used by one specific LAN
address or one specific LAN subnet?
All other SMTP traffic should continue using the defaults already in
place.
make another smtp in master.cf
mail.example.org unix - - n - -
smtp
-o inet_protocols=all
-o syslog_name=postfix/$service_name
-o smtp_bind_address=ipv4 address here
-o smtp_bind_address6=ipv6 address here
-o smtp_helo_name=mx.example.org
-o smtp_fallback_relay=
is how i do it :)
add more if you need more
next step is to add specifik transport maps in main.cf
sender_dependent_default_transport_maps =
hash:/etc/postfix/sender_dependent_default_transport_maps
# map file
m...@mail.example.org mail.example.org:
postmas...@mail.example.org mail.example.org:
ab...@mail.example.org mail.example.org:
add more if you need more :)
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