Can someone share how to increase the amount of time the SMTP server of Exchange 2003 takes to retry an email that has been rejected by a Greylisting email server to 1000 seconds? I understand that by default, Exchange makes 3 attempts at 1 second intervals. I received a message from a Greylisting server that requested a retry in 900 seconds. I'm going to attempt to bump ours to 1000 seconds.
If you have a more practical solution that works, please share.