Cannot Send Email Through Outlook Client
I am rather new to zimbra. I am having an issue where I cannot send through an Outlook client. I can send through the webmail wihout any issues. The error I get from the log is the following...
Aug 15 22:38:41 dlnx-073 postfix/smtpd: connect from (removed).sip.asm.bellsouth.net[(removed)]
Aug 15 22:38:42 dlnx-073 postfix/smtpd: NOQUEUE: reject: RCPT from (removed).sip.asm.bellsouth.net[(removed)]: 554 <(Address Removed)>: Relay access denied; from=<(Address Removed)> to=<(Address Removed)> proto=SMTP helo=<S3>
Aug 15 22:38:42 dlnx-073 postfix/smtpd: disconnect from (Address Removed).sip.asm.bellsouth.net[(Address Removed)]
In the Client I get a 554 Relay Access Denied.
I cannot find any errors anywhere else. POP into the box works, webmail in and out works, this has been driving me crazy all day.
I currently even have TLS disabled. I have tried sending through Outlook with both smtp authentication and without. I have also tried using both Outlook and Outlook express. I am baffled. Any help would be appreciated.