Iredmail / Postfix: Intentional policy rejection, please try again later

Root Cause

This problem is caused by the greylisting service on Iredmail, the service temporarily rejects emails.

Solution

We can whitelist emails from the regiapriandi.com domain for greylisting services using the following method.

$ python3 /opt/iredapd/tools/greylisting_admin.py --disable --from '@regiapriandi.com'