Hi: This question is just a request for information on this...
I currently use reject_sender_login_mismatch in my smtpd_sender_restrictions as an added precaution against someone sending undesirable mail. I see that I can also use reject_unauthenticated_sender_login_mismatch, but I don't understand how this would work. reject_sender_login_mismatch checks the from address against smtpd_sender_login_maps to be sure that the MAIL FROM address is owned by the SASL-authenticated sender. But with reject_unauthenticated_sender_login_mismatch, there is no SASL-authenticated sender. http://www.postfix.com/postconf.5.html says that reject_unauthenticated_sender_login_mismatch "Enforces the reject_sender_login_mismatch restriction for unauthenticated clients only" (and nothing more) All of that to get to my question: What does reject_unauthenticated_sender_login_mismatch check the MAIL FROM address against? Or does it just check the smtpd_sender_login_maps for a valid MAIL FROM address (regardless of ownership)? (yes, I'm trying to figure out if using this in my smtpd_sender_restrictions would help and how it might do so) Thank you!! --Jeff
