I have an aaplication server that I have granted permission to relay emails through our SMTP Virtual Server. WHen ever I try to send a message from the aaplication I get the following error message:
550 5.7.1 Unable to relay for email@example.com
Failed when sending RCPT TO: firstname.lastname@example.org
I know the email address is good, because it is my home email I am using to test with.
If anyone can help me out here it would be really appreciated.