iRedMail Intentional policy rejection

On an iRedMail, when receiving an email from steam, the mail server rejects the email with the error message “Recipient address rejected: Intentional policy rejection, please try again later”.

Jan 31 20:31:46 mail postfix/smtpd[2042109]: Anonymous TLS connection established from smtp-03-tuk1.steampowered.com[208.64.202.39]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Jan 31 20:31:47 mail postfix/smtpd[2042109]: NOQUEUE: reject: RCPT from smtp-03-tuk1.steampowered.com[208.64.202.39]: 451 4.7.1 : Recipient address rejected: Intentional policy rejection, please try again later; from= to= proto=ESMTP helo=
Jan 31 20:31:47 mail postfix/smtpd[2042109]: disconnect from smtp-03-tuk1.steampowered.com[208.64.202.39] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 quit=1 commands=5/7

This is due to gray listing in iRedMail server.

To whitelist steam in iRedMail, run

/opt/iredapd/tools/greylisting_admin.py --disable --from '@steampowered.com'

Example

root@mail:/var/log# /opt/iredapd/tools/greylisting_admin.py --disable --from '@steampowered.com'
* Disable greylisting: @steampowered.com -> @.
root@mail:/var/log# 
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