I'm not entirely sure if this is the place to post this but, I have a new error with postfix that popped up when using thunderbird. Code: warning: SASL authentication failure: Password verification failed Webmail works, just can't connect from outside. Which password is it referring to. I've double checked the password for firstname.lastname@example.org with mysql Could it have something to do with this: Code: 250-AUTH LOGIN NTLM DIGEST-MD5 PLAIN CRAM-MD5 Instead of: Code: 250-AUTH PLAIN LOGIN I can't change that. I did a grep for every mechlist that it found. Changing the values to plain login, didn't work. Edit: Oh, I should mention this is for sending mail, receiving it with courier and thunderbird works just fine.