https://docs.redhat.com/en/documentation/Red_Hat_Enterprise_Linux/6/html/deployment_guide/s2-email-procmail-recipes
19.4.2. Procmail Recipes | Deployment Guide | Red Hat Enterprise Linux | 6 | Red Hat Documentation
19.4.2. Procmail Recipes | Deployment Guide | Red Hat Enterprise Linux | 6 | Red Hat Documentation
red hat enterprise linuxdeployment guideprocmailrecipesdocumentation
https://www.eskimo.com/support/mail/procmail-system-rules/
Procmail System Rules | Support
system rulesprocmailsupport
https://hostblogger.de/blog/archives/7388-Procmail-zu-Sieve-Konverter.html
Procmail zu Sieve-Konverter | hostblogger.de
procmailzusievekonverterde
https://pr0.uk/linux/bash/script/spam/mailserver/procmail/2016/11/27/filter-a-list-of-addresses-with-procmail.html
Filter with procmail using a list of addresses from a file
list of addresses