In previous articles, we discussed several effective tips to block email spam. This tutorial will be showing you how to set up OpenDMARC with Postfix SMTP server on CentOS/RHEL to block email spoofing and spam. OpenDMARC is an open source DMARC email policy filter for MTAs (Message Transport Agent, aka SMTP server).

#centos #redhat #centos server #dmarc #linux #opendmarc #red hat #red hat server