handling spam from gmail.

[Ralph Seichter]

* Hendrik Boom:

> I use greylisting with my postfix. On Debian and Devuan th package is
> called 'postgrey'.

Classical, time-based greylisting like Postgrey is problematic in this
age of 2FA and other email-based confirmation codes. Besides, Postfix
has its own, superior mechanism called "Postscreen" built in.

This has recently been discussed once again, in-depth, on the Postfix
mailing list, so I suggest interested parties to check the ML archives.

-Ralph