Making no assertions\judgements as to the goal or intended path to get there…just helping with the original question…

Based on the submission server link below, it appears you will need to use the same auth mechanisms for submission as you do for imap\pop. So essentially, the same type of config for allowing no auth imap\pop connections should be how you cfg no auth submission connections.

In addition to the following links, I would also take a look at Dovecot’s default auth config file for more details on how to allow access without auth…

https://doc.dovecot.org/admin_manual/submission_server/
https://doc.dovecot.org/configuration_manual/authentication/

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On 28 Jul 2021, at 7:10, Dan Conway wrote:

Hello,

Is it possible to disable the requirement for authentication on the submission service? I'm trying to require authentication for all, except for a handful of IP addresses.

Thank you.

ehlo test.com
250-aaa
250-AUTH PLAIN LOGIN
250-BURL imap
250-CHUNKING
250-DSN
250-ENHANCEDSTATUSCODES
250-SIZE
250 PIPELINING
MAIL FROM:test@test.com
530 5.7.0 Authentication required.