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I've been having a really hard time with this; maybe someone here can help. I'm getting relay access denied to an email outside of my domain. It seems the passwords are authenticating because I'm not getting invalid password prompts.
is permit_sasl_authenticated required in all three lines? I'm thinking it may be unnecessary (and counterproductive) in the smtpd_sender_restrictions. In the logs, I see "certificate verification failed" for IPs/emails that we deliver mail to, which leads me to believe I need to modify something in those 3 lines above, no?