pipemess to redirect messages to amavisd-new

[pschelte]

Hello Gilles,

Thanks a lot for this great app ! The only drawback I have is that spam emails coming from host1 are directly delivered in my mailbox on host2. I have seen that pipemess could do something about this. How could I redirect all message to my host2 anti-spam amavisd-new with spamassassin/clamav ?

Kind regards

Philippe

[gilleslamiral]

I don't understand the issue. Spam messages are not filtered on host1 but you want to filter them with imapsync + spamassassin/clamav instead of just spamassassin/clamav ?

[pschelte]

host1 is a kind of backup server and In fact the spam filtering is only done on host2, it is there where I have my updated bayes database, I would like to have the email coming from host1 filtered by the spamassassin/clamav before being delivered to the mailbox of host2. Hope I'm more clear now.

[gilleslamiral]

It's more precise. The next question is why don't you use host2 as the first email receptor?

But you don't have to answer, it's your business.

For the imapsync --pipemess question, you need a command that takes a message from stdin, does anything it wants to it, and delivers the modified/unmodified message to stdout.

https://imapsync.lamiral.info/README
...

     --pipemess     cmd  : Apply this cmd command to each message content
                           before the copy.
     --pipemess     cmd  : and this one, etc.
                           With several --pipemess, the output of each cmd
                           command (STDOUT) is given to the input (STDIN)
                           of the next command.
                           For example,
                           --pipemess cmd1 --pipemess cmd2 --pipemess cmd3
                           is like a Unix pipe:
                           "cat message | cmd1 | cmd2 | cmd3"

I search a little but didn't find a tool interfacing the stdin/stdout way with amavis.

[gilleslamiral]

I searched more and found out that spamassassin or spamc are the commands to do the job.
So use:

imapsync ... --pipemess spamassassin 

or

imapsync ... --pipemess spamc

Those commands have to be working, installed, and configured, on the host running imapsync.

[migratis]

Thanks a lot Gilles, I will try this ans will make a feedback that would be useful for others.

[pschelte]

Hello Gilles,
Here is my feedback after using --pipemess this way, the result is that even when no messages has to be synchronized, the --pipemess command is executed, then I have this kind of logs in spamd :

Aug 11 13:00:02 [HOST] spamd[3714527]: spamd: connection from 127.0.0.1 [127.0.0.1]:54808 to port 783, fd 6
Aug 11 13:00:02 [HOST] spamd[3714527]: spamd: setuid to amavis succeeded
Aug 11 13:00:02 [HOST] spamd[3714527]: spamd: processing message (unknown) for amavis:120
Aug 11 13:00:02 [HOST] spamd[3714527]: spamd: identified spam (8.0/5.0) for amavis:120 in 0.0 seconds, 1 bytes.
Aug 11 13:00:02 [HOST] spamd[3714527]: spamd: result: Y 7 - EMPTY_MESSAGE,MISSING_DATE,MISSING_FROM,MISSING_HEADERS,MISSING_MID,MISSING_SUBJECT,NO_HEADERS_MESSAGE,NO_RECEIVED,NO_RELAYS scantime=0.0,size=1,user=amavis,uid=120,required_score=5.0,rhost=127.0.0.1,raddr=127.0.0.1,rport=54808,mid=(unknown),autolearn=no autolearn_force=no
Aug 11 13:00:02 [HOST] dovecot: imap-login: Login: user=<[EMAIL]>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=3716655, TLS, session=<g4FDEfXlOOR/AAAB>

kind regards

Philippe

[gilleslamiral]

That's strange.
Can you show me the log around one of these messages, with --debugmess option.
I see on your spamd log "size=1".
Is it a one-byte message?