[ Classic Linux and DirectAdmin. ]

Note. This is under development and will be revised. You can find a minimal simplified  .procmailrc  file for forwarding mail to an off-site address on this page: Example .procmailrc file for mail forwarding.

# $Id: procmailrc.form 13440 2021-02-02 17:20:59Z svn $
# $URL: svn+ssh://svn@svn.rahul.net/home/svn/main/trunk/stdpgm/procmailrc.form $

# This example .procmailrc file should be valid in both the Classic Linux
# and the DirectAdmin environments.

# Examples in this file have been only briefly tested. Editing changes
# might have introduced minor errors. Before deploying for production use,
# please test carefully so you don't lose mail.

# In this file, a single '#' begins a normal comment.
# A double '##' is used to comment out either a line of code
# or entire blocks of lines.

# Blocks of lines that belong together are enclosed within {{{ ... }}} comments.

# procmail log is saved in a subdirectory called “logs”.
# Make the subdirectory with the command “mkdir ~/logs”.
# To rotate procmail logs, so they don't fill up storage, the logrotate
# command can be used from a cron job, as described elsewhere.
LOGFILE=$HOME/logs/procmail.log

# verbose log, yes or no
##VERBOSE=no
VERBOSE=yes

# show successful delivery for all recipes, not just the final one
LOGABSTRACT=all

# only a precaution
SHELL=/bin/sh

## # Convenience symbols for pattern matching in shell commands.
## # Note: Definition of TAB should be a literal tab character.
## TAB = "	"
## SPACE = " "
## WS = "$TAB$SPACE"

# Force default mailbox to be our Maildir mailbox.
# Required in DirectAdmin, optional in Classic Linux.
ORGMAIL=Maildir/
DEFAULT=Maildir/

# 1^0 causes multiple conditions to be ORd.

## # Change empty subject to '(none)' {{{
## 
## :0fhw
## * 1^0 !^Subject:$
## * 1^0 ^Subject:[$WS]*$
##    | formail -i 'Subject: (none)'
## 
## # }}}


## # {{{
## 
## # Into a maildir format folder called “orexample” file messages that
## # satisfy one or more of the listed conditions.
## 
## :0
## * 1^0 ^From a@example\.com
## * 1^0 ^From b@example\.com
## * 1^0 ^TOc@example\.com
## * 1^0 ^Subject: some subject
##   Maildir/.orexample/
## 
## # }}}

# Without 1^0, multiple conditions are ANDed.

## # {{{
## 
## # Into a maildir format folder called “andexample” file messages that
## # satisfy all of the listed conditions.
## 
## :0
## * ^From c@example\.com
## * ^TOd@example\.com
## * ^Subject: another subject
##   Maildir/.andexample/
## 
## # }}}

## # {{{
## 
## # Into an mbox format folder called “legacyandexample” file messages
## # that satisfy all of the listed conditions. Note: mbox format is a
## # legacy format that is not recommended for normal use.
## 
## :0
## * ^From c@example\.com
## * ^TOd@example\.com
## * ^Subject: another subject
##   Mail/legacyandexample
## 
## # }}}

## # {{{
## 
## # Mail forwarding without changing envelope sender. This is the
## # usual method of mail forwarding.
## 
## # Note: Antispam techniques SPF, DKIM, and DMARC are in common use by
## # many sending domains, and may cause forwarded mail to be bounced,
## # lost, or filed into a spam folder.  Generally, mail forwarding is a
## # bad idea and not recommended. If you must do mail forwarding, don't
## # forward spam.  Service providers that receive much spam from us (even
## # if forwarded to yourself) may treat us as a spam site and begin
## # rejecting all mail from you, or all mail from our servers.
## 
## # Forward selected mail to you@example.com, preserving the original
## # envelope sender.  This is how you forward to any of the big free email
## # providers like Gmail, Hotmail, Yahoo.
##
## # Don't forward spam. Check for a SpamAssassin header X-Spam-Level
## # (don't forward if 5 or more stars) and an rspamd header X-Spam (if
## # Yes, typically spam level 6 or more).
## 
## #
## #  :0  used below means forward and don't retain original.
## #  :0c would mean forward a copy and retain original.
## 
## :0c
## * ^From:.*someuser@example\.com
## * !^X-Spam-Level: \*\*\*\*\*
## * !^X-Spam: Yes
##   ! you@example.com
## 
## # }}}

## # {{{
## 
## # Mail forwarding with modified envelope sender.
## 
## # Forward selected mail to you@example.com, explicitly setting the
## # envelope sender to me@example.com.
## 
## # Only if you really need this.
## 
## # Don't forward spam. Check for a SpamAssassin header X-Spam-Level
## # (don't forward if 5 or more stars) and an rspamd header X-Spam (if
## # Yes, typically spam level 6 or more).
## 
## #   :0  used below means forward and don't retain original.
## #   :0c would mean forward a copy and retain original.
## 
## :0c
## * ^From:.*someuser@example\.com
## * !^X-Spam-Level: \*\*\*\*\*
## * !^X-Spam: Yes
##   |/usr/sbin/sendmail -oi -fme@example.com you@example.com
## 
## # }}}


# Anything that has not matched so far goes into our default Maildir.
#
# Incorrect:  Maildir
# Incorrect:  Maildir/.
# Correct:    Maildir/

:0
  Maildir/