On 6/17/2019 6:20 AM, Nicolas Kovacs wrote: > Hi, > > I'm managing several mail servers running CentOS 7, Postfix and Dovecot. > SpamAssassin is filtering mail nicely, but I'm considering using RBL > (blacklists) to take some load off the servers. > > General question to those of you who use RBL. Which lists do you > recommend using? The best free blacklist that I'm aware of is zen.spamhaus.org. I've been using it as a blacklist on my server for years without any problems. More info: https://www.spamhaus.org/zen/ -- Bowie