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Morpheu5
Asked: 2018-11-16 07:20:12 +0800 CST

How do I teach spam and ham to spamassassin running in a docker container?

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I'm running SpamAssassin as a milter in a Docker container separate from Postfix and Dovecot. Postfix and SA work together nicely, Postfix connects to spamass-milter, SA does its thing, mail gets flagged appropriately, all good.

Now, I'd like to be able to teach SA spam from ham when I move messages back and forth between Inbox and Junk, more or less like in this guide. I confirmed that sieve works by having a simple filter that moves spam to the Junk folder when flagged so by SA, and it seems to work. Dovecot also runs in its own Docker container.

That guide implies that the spamc command can connect to a SA instance via TCP, which would be great if only that didn't mean that I have to have spamc available inside the container running Dovecot, which means having to install SA inside that very container, which means in turn lots of unnecessary duplication.

Is there a way around this?

EDIT It was suggested that Ubuntu-based containers have a spamc package. However, I'm using a CentOS base image, which does not have a separate spamc package.

docker

1 Answers

  1. Best Answer

    Yes there is!

    As you need only spamc in your Dovecot container, you should solely install spamc and not Spamassassin in the Dovecot container.

    Debian/Ubuntu (Dovecot Container):

    apt install spamc

    CentOS (Dovecot Container):

    You may install solely spamc with pip (Python Package Manager).

    pip install spamc

    In case your container does not have pip already installed:

    Add the EPEL Repository:

    yum install epel-release

    Install pip:

    yum install python-pip

    And now install spamc with pip as mentioned above.

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