Add a whitelist feature to complement the greylisting

[rcfa]

I use greylisting, as it noticeably reduces spam.
However, there’s one particular problem: some types of two factor logins or confirmation link e-mails expire before greylisting allows the e-mail to be delivered.
So it should be possible to define (a select few) e-mail address patterns that are delivered bypassing regular greylisting, because they match a whitelist pattern.
This way. a few specific sender patterns can be exempt. and 2FA messages can be delivered in a timely fashion despite greylisting.

[mdecimus]

This won't be supported unfortunately as the recommendation is to avoid using greylisting. I understand that it works for you but if you enable the spam filter with DNSBL and all default rules you shouldn't need greylisting.

[jabdoa2]

I would like this feature as well. One reason greylisting helps is that it will allow spammers to hit spam traps and DNSBLs to be updates. You will basically win the race every time with Greylisting. On the other hand some senders using multiple outbound IPs (looking at you AWS SES) cause multi hour delays.

On my previous setup we would skip greylisting on high reputation senders (using postscreen). We also maintained a small whitelist as requested here (for login codes, 2FA etc).