iRedMail :: Recipient address rejected: Policy Rejection

:: What’s iRedMail
iRedMail is an open source full-featured mail server solution provided by Linux/BSD.

:: How to fix Recipient address rejected
If you got error in mail log like:

 Recipient address rejected: Policy Rejection- Please try later.;

Just remove greylist in /etc/policyd.conf

vi /etc/policyd.conf

change greylisting like this:

GREYLISTING=0

restart policyd

/etc/init.d/policyd restart