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I'm running Ubuntu, have Postfix installed. Followed to the letter.

I can receive email via IMAP and POP3 perfectly in Thunderbird. But when I try to send emails, both Outlook and Thunderbird keep saying I've entered the wrong login. I enabled SMTP-AUTH and TLS.

I tried changing the ports from 25 to 587, but it didn't change anything so it's not an ISP issue.

Does anyone have any suggestions? Been trying to fix this for like 6 hours. Thanks!


migration rejected from Dec 4 '15 at 10:23

This question came from our site for professional and enthusiast programmers. Votes, comments, and answers are locked due to the question being closed here, but it may be eligible for editing and reopening on the site where it originated.

closed as off-topic by mdpc, HBruijn Dec 4 '15 at 10:23

This question appears to be off-topic. The users who voted to close gave this specific reason:

If this question can be reworded to fit the rules in the help center, please edit the question.

Outlook Express (don't remember with full Outlook) does not support TLS. It only supports SSL. You might check to ensure you have SSL enabled on your SMTP server.