----- Message from Wietse Venema via Postfix-users
<[email protected]> ---------
Date: Wed, 30 Sep 2026 09:19:36 -0400 (EDT)
From: Wietse Venema via Postfix-users <[email protected]>
Reply-To: Wietse Venema <[email protected]>
Subject: [pfx] Re: Guidance required on status=bounced (SMTPUTF8 is
required, but was not offered by host y.y.y.y)
To: Postfix users <[email protected]>
anant--- via Postfix-users:
Thank you.
But, currently the issue is for incoming mails for our domain. Within
our setup, while relaying it is getting bounced.
Inbound relaying typically goes like this (example taken from
https://www.postfix.org/STANDARD_CONFIGURATION_README.html)
On the primary MX:
/etc/postfix/main.cf:
relay_domains = example.com
relay_transport = relay
relay_recipient_maps = lmdb:/etc/postfix/relay_recipients
transport_maps = lmdb:/etc/postfix/transport
...
/etc/postfix/relay_recipients:
[email protected] x
[email protected] x
. . .
/etc/postfix/transport:
example.com relay:[inside-gateway.example.com]
/etc/postfix/master.cf:
relay .. .. .. .. .. .. smtp
-o smtputf8_enable=no
This will receive SMTPUTF8 messages from external sites and forward
them to a non-SMTPUTF8 internal server.
Wietse
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----- End message from Wietse Venema via Postfix-users
<[email protected]> -----
Thank you.
As there is only one internal relay server for us, is it OK to set
smtputf8_enable=no in main.cf on the primary MX, as all mails received
will be relayed to that server only.
Anant S Athavale
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