Changing Postfix Greylist Duration

To change the waiting time for whitelisting with PostfixGreylist, you need to follow the steps below.

nano /etc/default/postgrey

POSTGREY_OPTS="--inet=10023 --delay=30"

After waiting 30 seconds, it will be blacklisted or whitelisted.

Then restart with the command below.

systemctl restart postgrey

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