E-Mail Bounce Backs
Posted on 2013-06-11
Hi. I am trying to send e-mail through my exchange server & am getting bounce backs with this NDR:
server.commitcrm.com rejected your message to the following e-mail addresses:
server.commitcrm.com gave this error:
Please turn on SMTP Authentication in your mail client, or login to the IMAP/POP3 server before sending your message. remote.ourdomain.com [74.xxx.xxx.90]:56989 is not permitted to relay through this server without authentication.
MX & other DNS checks out. We;re not using any POP/IMAP, just SMTP. Any ideas?
Thanks in advance -- JR