Re: [Dovecot] Trouble implementing Antispam plug-in for Dovecot

On 9/19/2012 5:41 PM, Ben Johnson wrote:

On 9/11/2012 10:40 AM, Ben Johnson wrote:

...

You nailed it, Ben. Thanks!

I downloaded/installed the dovecot-dev package from the same maintainer and was able to build Antispam without issue.

The hang-up now seems to be with my configuration.

I'm seeing the following error in my email client whenever I attempt to move an email message from, say, Inbox to Junk folder:

[SERVERBUG] BUG Unknown internal error.

Nothing at all appears in syslog when this happens.

I followed the instructions at http://wiki2.dovecot.org/Plugins/Antispam , to the letter, I believe.

The relevant portions of my configuration are as follows:

---

protocol imap { mail_plugins = quota imap_quota antispam }

plugin { quota = dict:user::file:/var/vmail/%d/%n/.quotausage sieve = /var/vmail/%d/%n/.sieve

antispam_backend = MAILTRAIN antispam_mail_sendmail = /usr/bin/sa-learn-pipe.sh antispam_mail_spam = --spam antispam_mail_notspam = --ham antispam_spam_pattern_ignorecase = spam;junk }

The permissions and execute bit are set in accordance with other executables in the same directory:

# ls -lah /usr/bin/ | grep -i "sa-learn-pipe.sh" -rwxr-xr-x 1 root root 297 Sep 5 11:17 sa-learn-pipe.sh

I would provide more log content, but the debug options seem to be gone in the forked, >= 2.0 version of this plug-in.

Any ideas are very much appreciated.

Thanks,

-Ben Given that nobody shared any insight here, I decided to stand-up a completely new VM with Ubuntu 12.04 LTS and see if the same error occurs.

While the error is different this time around, I am still unable to get any variant of the dovecot-antispam plug-in working.

When I attempt to use the current packages from Ubuntu 12.04.1 LTS, and I use the above configuration, my syslog fills-up with the following:

dovecot: imap-login: Login: user=user@example.com, method=PLAIN, rip=10.0.1.57, lip=10.0.1.8, mpid=2879, TLS dovecot: master: Error: service(imap): child 2879 returned error 3

Surprisingly, I can find only two other mentions of "error 3" anywhere on the Internet. Those mentions were from another user to this mailing list:

http://www.dovecot.org/list/dovecot/2012-August/067787.html http://www.dovecot.org/list/dovecot/2012-August/067814.html

The lack of "error 3" ubiquity leads me to believe that I must be doing something stupid.

There's no question that this behavior is related to the antispam-plugin, because when I commented-out the relevant lines in Dovecot's configuration file, the error does not occur.

I have followed the instructions at http://wiki2.dovecot.org/Plugins/Antispam to the letter, and this is the result.

The only instance in which I diverged from the Wiki article is that I used the Ubuntu-provided dovecot-antispam package (instead of compiling the plug-in from source).

I am trying to use the "mailtrain" back-end, per the above-cited Wiki article, to call SpamAssassin's "sa-learn" utility for real-time learning.

I am not using the SpamAssassin daemon (spamd).

I'm about to throw in the towel on this plug-in, so any help would be greatly appreciated.

Thank you,

-Ben

I've never used this plugin but let offer up my home brewed script that I call from crontab: # Process and delete .Spam and .Ham Maildirs 11 */4 * * * /usr/local/sbin/maildir.sa-learn

and /usr/local/sbin/maildir.sa-learn: #!/bin/bash

MAILDIR=Maildir

LS=/bin/ls RM=/bin/rm SU=/bin/su FIND=/bin/find SALEARN=/usr/bin/sa-learn

for i in $LS /home; do prefs="/home/$i/.spamassassin/user_prefs"

# [ ! ."$i" == ".bill" ] && continue echo $i spamdir="/home/$i/$MAILDIR/.SystemFolders.Spam" [ ! -d "$spamdir" ] && continue

     $SU -c "$SALEARN --prefspath=$prefs --spam $spamdir/new" $i
     $FIND "$spamdir/new" -type f -delete

     $SU -c "$SALEARN --prefspath=$prefs --spam $spamdir/cur" $i
     $FIND "$spamdir/cur" -type f -delete


     hamdir="/home/$i/$MAILDIR/.SystemFolders.Ham"
     [ ! -d "$hamdir" ] && continue

     $SU -c "$SALEARN --prefspath=$prefs --ham $hamdir/new" $i
     $FIND "$hamdir/new" -type f -delete

     $SU -c "$SALEARN --prefspath=$prefs --ham $hamdir/cur" $i
     $FIND "$hamdir/cur" -type f -delete

done

With my setup each user has their own spamassassin user_prefs and bayes tokens.

Bill