4 ms·Because of course, its an arms race.by cbsmith 3y agoBecause of course, its an arms race.paulnpace 3y ago> Because of course, its an arms race. Somewhat out of context, but greylisting works as well as the day it came out.cbsmith 3y agoProbably should put "works" in quotes...paulnpace 3y agoI've been using it for over a decade and I have only one domain I've had to make a rule in Postfix for because their admins don't know how to configure their racks of SMTP servers.