Originally Posted by falko
Did you enable "Server needs authentication" in your email client?
I have a similar issue. I can send mail from the server using command line (telnet), however using Outlook I get relay access denied. I have Outlook set to use authentication (same settings as incoming mailserver). I receive mail just fine in Outlook.
log: Dec 17 02:13:46 mail postfix/smtpd: NOQUEUE: reject: RCPT from static-12-134-58-18.verizon.net[12-134-58-18]: 554 5.7.1 <email@example.com>: Relay access denied; from=<firstname.lastname@example.org> to=<email@example.com> proto=ESMTP helo=<computername>
Would you have any ideas? Thanks!