Tweaking Mail-in-a-Box

Disable greylisting

Disabling greylisting helps to receive emails without any delay.

touch /etc/postgrey/whitelist_clients.local
nano /etc/postgrey/whitelist_clients.local

Then add

# Don't greylist any domain.
/.*/

Save and Exit, then enter commands:

service postgrey restart
service postfix restart

Source: https://discourse.mailinabox.email/t/disable-greylisting-modify-whitelist/137/2

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