No-cost RHEL for small production workloads

You might have heard the rumor that Redhat had basically killed the Centos product line as we knew it in last December: https://blog.centos.org/2020/12/future-is-centos-stream/ This caused a massive disturbance in the Centos users’ community, see https://arstechnica.com/gadgets/2020/12/centos-shifts-from-red-hat-unbranded-to-red-hat-beta/  for more on the topic. So Redhat in a response…

SMTP ACL list

By default the piler-smtp server receives emails from any sources, and it may be a challenge to get rid of spammers accessing port 25. You may have several options to achieve that, eg. use iptables or a network firewall to restrict smtp access to the…