Dovecot With DSpam AntiSpam Plugin Replacement With Sieve

[Trever L. Adams]

Thank you for this. I have a DSPAM setup that did work with the
suggested scrips, but I used the old dovecot antispam plugin and enjoyed
the signature method. I am going to try this out next week to see if it
works for me. If it does, I will love this.

Thanks again.
Trever

On 02/24/2018 02:02 PM, colinh at nxtgn.com wrote:
> Hello
>
> I have recently had to rebuild my email server, it is a small server
> for my various email accounts and I also host the email for a clients
> business.
>
> Switched to Dovecot from Courier many years ago, and it has been a
> very reliable solution With the new rebuild I have updated it to
> Dovecot 2.2.33.2 with PigeonHole 4.21, it runs DSpam 3.10.2 to scan
> and tag all incoming mails as Spam or not then a Sieve rule to put the
> Spam emails into the Spam folder, I was also using the DSpam Antispam
> plugin to enable moving messages from one folder to another to teach
> failures to DSpam, this works well for my and my client.
>
> Doing the rebuild I saw that the AntiSpam plugin had been deprecated
> and the preferred solution now was to use Sieve Filters, so I
> implemented that and had struggled with it for a few hours until I
> finally got it working.
>
> It may be something about my setup but I am not sure it is, but the
> suggested way of doing it here
> https://wiki.dovecot.org/HowTo/AntispamWithSieve did not work for me
> and I don't think  it was ever going to.
>
> Here are the shell scripts and sieve filters that I came up with that
> work for me, your mileage may vary.
>
> I use DSpam as a standalone binary not as a daemon so you may need to
> add the --client option on the dspam command line in the shell scripts
> if you run DSpam in daemon mode.
>
> === report-spam.sieve ===
>
> require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment",
> "variables"];
>
>
> if environment :matches "imap.user" "*" {
>   set "userid" "${1}";
>   if header :matches "X-DSPAM-Signature" "*"
>   {
>        set "signature" "${1}";
>   }
> }
>
> pipe :copy "learn-spam.sh" [ "${userid}", "${signature}" ];
>
> === report-ham.sieve ===
>
> require ["vnd.dovecot.pipe", "copy", "imapsieve", "environment",
> "variables"];
>
> if environment :matches "imap.mailbox" "*" {
>   set "mailbox" "${1}";
> }
>
> if string "${mailbox}" "Trash" {
>   stop;
> }
>
> if environment :matches "imap.user" "*" {
>   set "userid" "${1}";
>   if header :matches "X-DSPAM-Signature" "*"
>   {
>        set "signature" "${1}";
>   }
> }
>
> pipe :copy "learn-ham.sh" [ "${userid}", "${signature}" ];
>
> === learn-spam.sh ===
>
> #!/bin/sh
> exec /usr/local/bin/dspam --user ${1} --signature=${2} --class=spam
> --source=error
>
> === learn-ham.sh ===
>
> #!/bin/sh
> exec /usr/local/bin/dspam --user ${1} --signature=${2}
> --class=innocent --source=error
>
>
> I hope this saves someone some time or gives someone some tips
>


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