Am 17.06.2019 um 16:50 schrieb Bowie Bailey: > 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/ Spmhaus isn't free per se. https://www.spamhaus.org/organization/dnsblusage/ Alexander