maildrop

TNEFclean

Deal with Winmail.dat attachments are included in received e-mail messages in Outlook by filtering messages through TNEFclean that re-encodes the attachments into standard MIME format

https://www.antagonism.org/mail/tnefclean-maildrop.shtml

Technology:

Move spam messages

Deliver messages that have been flagged as spam by Spamassassin or dspam into special IMAP folders and remove some clutter from your Inbox.

Spamassassin
There's a couple of ways to have spam messages filltered depending on how your Spamassassin has been configured:

  • Spamassassin has been configured to add X-Spam- headers to messages:
    if (/^X-Spam-Flag: *YES/)
    {
      to $VHOME/Maildir/.Spam
      exit
    }
  • Subject rewritten:
    if (/^X-Spam-Flag: *YES/)
    {
      to $VHOME/Maildir/.Spam
      exit
    }

Technology:

Spam folder creation

Automatically create set of IMAP folders for sorting detected spam out of users' Inboxes and/or training a spam filter.

Spam folder creation for all users
For training a spam folder such as dspam, we'll give our users a "Spam" folder with subfolders for messages that were spam as well as folders for false positives and false negatives. We can install a global mailfilter on a domain that will make sure that those IMAP folders exist.
Create the Maildrop filter /home/vpopmail/domains/.mailfilter:

SHELL="/bin/sh"
import EXT
import HOST
VPOP="| /home/vpopmail/bin/vdelivermail '' bounce-no-mailbox"

Technology:

Filters

Maildrop allows you to filter mail by calling it using a .qmail file in a user's vpopmail home directory. It can be used to filter mail through SpamAssassin, with per-user configuration options, or to filter mail into subfolders of their mailbox depending on specified criteria. eg. Mail that SpamAssassin has flagged as spam can be moved to a special folder.

Filter Writing Guides and Examples
http://www.antagonism.org/mail/folder-creation-maildrop.shtml
http://www.courier-mta.org/maildrop/maildropfilter.html
http://mugurel.sumanariu.ro/qmail/qmail-move-spam-mail-to-junk-folder-using-maildrop/
Environment variables
The following snippet of code is a good opening for your filter script and will set some important variables for your script to use:

SHELL="/bin/sh"
import EXT
import HOST
VPOP="| /home/vpopmail/bin/vdelivermail '' bounce-no-mailbox"
VHOME=`/home/vpopmail/bin/vuserinfo -d $EXT@$HOST`
VDHOME=`dirname "$VHOME"`
logfile "/tmp/log-maildrop"

Technology:

Maildrop

Maildrop is a mail filter/delivery agent that can be used with your Qmail server to customize how messages are handled as they are delivered. One capability is to have messages moved to a particular IMAP folder as they are delivered to the user's mailbox.

Prerequisites
Maildrop requires PCRE to be installed:

cd /extra/src
wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.37.tar.gz
tar zxvf pcre-8.37.tar.gz
cd pcre-8.37
./configure --enable-utf8
make
make install

Version 2.8.1 requires the Courier Unicode Library

Technology:

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