Inbound mail to a specific user is been forwarded to his external mailbox at another domain. Add mails are routed correctly with the exception of one domain. When mail are sent to users of my domain, including that user, the mails are delivered to everyone except him...as the mail admin I am getting the message
The following recipient(s) cannot be reached:
usermailbox on 1/10/2011 1:27 PM There was a SMTP communication problem with the
recipient's email server. Please contact your system administrator. email.speedimpex.com #5.5.0 smtp;587 email@example.com sender domain does not match SPF records>
I am sure this has nothing to do with my mail server, however, can someone confirm?