[Dovecot] sa learning from an imap spam folder

[frank.kintrup at fkware.de]

This is my approach, stored in /etc/cron.hourly. It's very new, so I'm
still testing
it. 

The goal is to learn HAM massages only if they are a day old, so that I can
manually
remove SPAM that slipped through. Mails tagged from Spamassassin are sorted
automatically into the "Junk.Spam" mailbox and learned after 12 hours. I
manually 
move any missed SPAM into the .Junk mailbox, so I'm sure there are no
wrongly 
tagged messages there, so I can learn those messages as soon as they are
found
by cron.

/etc/cron.hourly/sa-learn:



#!/bin/sh
 
umask 022
 
# Learn HAM messages which were roughly received between 24 and 25 hours
ago
find \
  /var/vmail/fkware.de/frank.kintrup/Maildir/ \
  -path '/var/vmail/fkware.de/frank.kintrup/Maildir/.Junk*' -prune -o \
  -path '/var/vmail/fkware.de/frank.kintrup/Maildir/.Sent'  -prune -o \
  -path '/var/vmail/fkware.de/frank.kintrup/Maildir/.Trash' -prune -o \
  -path '/var/vmail/fkware.de/frank.kintrup/Maildir/.Draft' -prune -o \
  -iname '*server.fkware.de*' -type f -mmin +1435 -mmin -1505 \
  -execdir sa-learn --username=vmail --no-sync --ham {} \; \
  /dev/nul 2>/dev/nul
 
# Learn and delete SPAM messages which were manually moved to the Junk
folder
find \
  /var/vmail/fkware.de/frank.kintrup/Maildir/.Junk/ \
  -iname '*server.fkware.de*' -type f \
  -execdir sa-learn --username=vmail --no-sync --spam {} \; \
  -execdir rm {} \; \
  >/dev/nul 2>/dev/nul
 
# Learn and delete SPAM messages which were received more than 12 hours ago
# and automatically put into the Junk.Spam folder
find \
  /var/vmail/fkware.de/frank.kintrup/Maildir/.Junk.Spam/ \
  -iname '*server.fkware.de*' -type f -mmin +720 \
  -execdir sa-learn --username=vmail --no-sync --spam {} \; \
  -execdir rm {} \; \
  >/dev/nul 2>/dev/nul
 
sa-learn --username=vmail --sync >/dev/nul
 
exit 0