Re: Dovecot2 Antispam MAILTRAIN backend with SpamAssassin

15 Jul 2014


      I remember, that I also struggled for quite a while until I figured it
out. Here is what I used on my FreeBSD Dovecot installation ...
Remember, that the following code is working on "dovecot --version
1.2.12" ... but it could also be valid for later versions. I simply
havn't checked it out yet.
### Dovecot AntiSpam ###
# mail signature (used with any backend requiring a signature)
#antispam_signature = X-Spam-Status
#antispam_signature_missing = move
antispam_mail_sendmail = /usr/local/etc/dovecot/sa-learn-helper.sh
antispam_mail_sendmail_args = --username=%Lu
antispam_mail_spam = --spam
antispam_mail_notspam = --ham
antispam_mail_tmpdir = /tmp
antispam_spam = Spam
#antispam_unsure = Virus
antispam_trash = Trash
echo '#!/usr/local/bin/bash
#/usr/local/bin/sa-learn ${1} ${2} ${3} ${4} &>
/var/log/DoveDamnAntiSpam.log
/usr/local/bin/sa-learn "${1}" "${2}" "${3}" "${4}"
exit 0
' > /usr/local/etc/dovecot/sa-learn-helper.sh
chmod 0777 /usr/local/etc/dovecot/sa-learn-helper.sh ;
chown root:wheel /usr/local/etc/dovecot/sa-learn-helper.sh ;
Best regards
Leander
Am 15.07.14 15:00, schrieb Mohammad S. Babaei:
...
Hi there,
I've already asked this question on FreeBSD forums without getting any
response. So, I thought it's a good idea to ask it again here.
I've setup Dovecote2 (2.2.13) + Postfix + SpamAssassin on my FreeBSD 10
VPS and it works flawlessly. Though, I couldn't setup the Dovecot
Antispam plugin to train SpamAssassin when I move mails to the Junk
folder.
I installed the plugin from FreeBSD ports and followed the official
documentation [1] and the man page [2] without any success.
This is my configuration:
########
# 2.2.13: /usr/local/etc/dovecot/dovecot.conf
# OS: FreeBSD 10.0-RELEASE-p6 i386 ufs
auth_mechanisms = plain login digest-md5
disable_plaintext_auth = no
first_valid_gid = 6
first_valid_uid = 26
last_valid_gid = 6
last_valid_uid = 26
lmtp_save_to_detail_mailbox = yes
mail_gid = mail
mail_location = mdbox:/mail/%d/%u
mail_privileged_group = mail
mail_uid = mailnull
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date ihave
namespace inbox {
inbox = yes
location =
mailbox Archive {
auto = no
special_use = Archive
}
mailbox Drafts {
auto = subscribe
special_use = Drafts
}
mailbox Flagged {
auto = no
special_use = Flagged
}
mailbox Junk {
auto = subscribe
special_use = Junk
}
mailbox Sent {
auto = subscribe
special_use = Sent
}
mailbox Trash {
auto = subscribe
special_use = Trash
}
mailbox virtual/All {
auto = no
special_use = All
}
prefix =
separator = /
}
passdb {
args = /mail/%d/dovecot_passwd
driver = passwd-file
}
plugin {
antispam_backend = MAILTRAIN
antispam_mail_notspam = --ham
antispam_mail_sendmail = /mail/sa-learn-pipe.sh
antispam_mail_spam = --spam
antispam_spam = Junk
antispam_trash = Trash
quota_rule = *:storage=8GB
sieve = /mail/%d/%u/dovecot.sieve
sieve_dir = /mail/%d/%u
sieve_global_dir = /mail/sieve
sieve_global_path = /mail/sieve/globalfilter.sieve
}
protocols = imap pop3 lmtp sieve
service auth {
unix_listener auth-client {
group = mail
mode = 0660
user = postfix
}
unix_listener auth-master {
group = mail
mode = 0600
user = mailnull
}
user = root
}
service imap-login {
inet_listener imap {
address = *
port = 143
}
inet_listener imaps {
address = *
port = 993
}
process_limit = 32
process_min_avail = 1
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0660
user = postfix
}
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
process_min_avail = 0
service_count = 1
vsz_limit = 64 M
}
service managesieve {
process_limit = 1024
}
service pop3-login {
inet_listener pop3 {
address = *
port = 110
}
inet_listener pop3s {
address = *
port = 995
}
process_limit = 32
process_min_avail = 1
}
ssl_cert = </etc/ssl/dovecot/cert.pem
ssl_key = </etc/ssl/dovecot/key.pem
userdb {
args = /mail/%d/dovecot_passwd
driver = passwd-file
}
verbose_proctitle = yes
protocol lmtp {
mail_plugins = " sieve"
postmaster_address = postmaster@SomeDomain.com
quota_full_tempfail = yes
}
protocol sieve {
mail_max_userip_connections = 10
managesieve_implementation_string = Dovecot Pigeonhole
managesieve_logout_format = bytes=%i/%o
managesieve_max_line_length = 65536
}
protocol imap {
imap_client_workarounds = delay-newmail tb-extra-mailbox-sep
mail_plugins = " quota imap_quota antispam"
}
protocol pop3 {
mail_plugins = " quota"
pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
}
protocol lda {
mail_plugins = " quota sieve"
postmaster_address = postmaster@SomeDomain.com
sendmail_path = /usr/local/sbin/sendmail
}
########
And, this is the script /mail/sa-learn-pipe.sh:
########
echo /usr/local/bin/sa-learn $* /tmp/sendmail-msg-$$.txt
echo "$$-start ($*)" >> /tmp/sa-learn-pipe.log
#echo $* > /tmp/sendmail-parms.txt
cat<&0 >> /tmp/sendmail-msg-$$.txt
/usr/local/bin/sa-learn $* /tmp/sendmail-msg-$$.txt
rm -f /tmp/sendmail-msg-$$.txt
echo "$$-end" >> /tmp/sa-learn-pipe.log
exit 0
########
I made it excecutable by all users using chmod a+x
/mail/sa-learn-pipe.sh
The problem is, there is no log in /var/log/maillog regarding the
Antispam plugin, and the script won't get called when I move any message
in/out to/from Junk folder.
I'll appreciate any help.

Re: Dovecot2 Antispam MAILTRAIN backend with SpamAssassin

Leander Schäfer