5.4.7 - Delivery expired

[pastorboi_ironport]

The following message to <aol> was undeliverable.
The reason for the problem:
5.4.7 - Delivery expired (message too old) [Default] 421-': (DNS:NR) http://postmaster.info.aol.com/errors/421dnsnr.html\nSERVICE NOT AVAILABLE'

[Donald Nash]

Did you try clicking on that URL? AOL puts URLs in its SMTP responses for a good reason, and that one very clearly explains the problem.

[pastorboi_ironport]

Yes I did, but now I'm trying to create a PTR record in DNS.