On 2022-01-11 at 02:21:23 UTC-0500 (Tue, 11 Jan 2022 15:21:23 +0800)
JWD <j...@163.com>
is rumored to have said:
There is a website, which sending email use smtp authentication only,
can not use anonymous.
Postfix is a mail gateway, and I don't want install a smtp
authentication backend.
Will permit_mynetworks parameter ignore smtp authentication, and
accept the email?
It depends on where you use it.
Postfix has multiple restriction lists, one for each phase of the SMTP
transaction. Typically smtp_recipient_restrictions or
smtp_relay_restrictions will include 'permit_sasl_authenticated' with
'reject' or 'reject_unauth_destination' later (generally last) in the
same list. If you add 'permit_mynetworks' BEFORE a reject directive in
the same restriction list, you will let local machines relay mail via
SMTP.
NOT requiring authentication for initial message submission can be a
great way to guarantee that after spammers find your system, it will be
heavily abused until most of the rest of the Internet refuses to accept
any mail from it.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
