--On Friday, September 20, 2019 2:06 PM -0500 Chris Adams <linux at cmadams.net> wrote: >> How would you implement the section here titled "Sendmail >> workaround" using Postfix? > > http://www.postfix.org/postconf.5.html#recipient_delimiter Perfect. I think the only other significant customizations I have are lines to use the MIMEDefang and OpenDKIM milters. When last I looked into migrating, I recall that Postfix handled milters just fine. Meanwhile, I'd considered replacing procmail with the Dovecot delivery program to get access to Sieve filtering but didn't see how to easily invoke SpamAssassin as I do now in /etc/procmailrc. Is Procmail still the default delivery agent in RHEL8?