I'm having SMTP Authentication relaying issues that look like this in /var/log/exim_mainlog: 2006-06-26 13:28:03 fixed_login authenticator failed for (dufflepod) [18.104.22.168]: 535 Incorrect authentication data (firstname.lastname@example.org) POP before SMTP works, but not SMTP Authentication. I have looked extensively in these forums and online and have tried the following: /scripts/upcp --force /scripts/eximup --force /scripts/mailperm service syslog restart service exim restart And I restarted the server. I may have caused the problem initially by accidentally running chown root:root * inside /etc/. I compared the ownership of every file/directory against another cpanel server we have and fixed ownerships everywhere I could, and now it seems to be correct, though I wonder if I somehow missed something. Users were unable to email anyone outside of the local server, but they can now.. just wont let users send via SMTP Authentication method, only POP before SMTP. All the accounts on this server were recently copied over from an older server, if that helps. Help would be *GREATLY* appreciated!! I'm going crazy I've spent all day on this.