My email server is mail.wbu.edu. Whenever we try to send to a particular email domain we are getting undeliverables. We are trying to send to moody.edu. The error we are getting is below.
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<mail.wbu.edu #5.7.1 smtp;550 5.7.1 <firstname.lastname@example.org>... HELO mail.wbu.edu from 18.104.22.168 SPF result Fail; >