450 Error with Postfix
- by Shiv
I have setup postfix to send outgoing mail, It works fine for most of the cases except for some e.g duke.alumni.edu where it gives me a 450 error, even though the email address is valid.
This is the exact error I get
Sender address rejected: Domain not found (in reply to RCPT TO command))
Any suggestions on how I can rectify this?