On 2022-01-11 08:21, JWD wrote:
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?

logs please

port 25 does hopefully not have sasl auth enabled, and the remote try to find one with unnesserly sasl auth misstake

that would be reveled if you provide logs

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