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I'm going to implement a mailfiltering gateway for my company. I'm going to use Postfix, with a PostgreSQL back-end.

The question would be: how to best implement the antispam measures.

  • Mailscanner + SpamAssassin?
  • amavisd-new + SpamAssassin?

(Note: I don't need antivirus filtering)

I've been searching for up-to-date comparison between Mailscanner and amavisd-new, but most comparisons I found are severely out of date.

Can someone provide me an up-to-date comparison or a link to such?

TIA

pepoluan
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  • But, consider this point of view: http://wiki.mailscanner.info/doku.php?id=documentation:configuration:mta:postfix:politics –  Mar 22 '12 at 21:06

1 Answers1

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Silly me. Just found out about this page:

http://www.postfix.org/addon.html

... and I quote:

mailscanner system, works with Postfix and other MTAs. WARNING: This software uses unsupported methods to manipulate Postfix queue files directly. This will result in corruption or loss of mail. The mailscanner authors have sofar refused to discuss a proper access API or protocol.

Case solved. amavisd-new, it will be.

Thanks for everyone who have tried to answer!

Edit:

In the comments, @Spikolynn referred to http://wiki.mailscanner.info/doku.php?id=documentation:configuration:mta:postfix:politics , which explains how Postfix now implements a 'holding' queue which should prevent queue corruption.

Many improvements have happened on the Postfix side since this question was asked; so if you happen upon this Q&A as a result of a search, please be aware that the situation might not be as clear cut as it was when I came upon the problem.

pepoluan
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  • Could you accept this as the answer to your question? Would help other visitors and keep the site clean(er). – the-wabbit Nov 28 '11 at 17:58
  • @syneticon-dj I'd like to, but it's still under embargo (i.e., clicking on the checkmark pops up a box "You can accept your own answer tomorrow") :) – pepoluan Nov 29 '11 at 05:01
  • BTW, as a side note: amavisd-new is working quite well with postfix. We're using it with AV scanners enabled, although technically there hardly would ever be a need due to configurable blocking by filetype - we just block executables and whatever is currently on the "potentially harmful" list. – the-wabbit Nov 29 '11 at 09:12
  • @syneticon-dj I had dabbled with amavisd-new before, and honestly didn't find any grievances. However, someone in a mailing list mentioned Mailscanner, and that's why I asked my question. Anyways, thanks for sharing your experience :-) – pepoluan Nov 29 '11 at 17:12
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    the http://wiki.mailscanner.info/doku.php?id=documentation:configuration:mta:postfix:politics mentions a way you can configure mailscanner/postfix to not corrupt queues :) – Spikolynn Sep 01 '14 at 00:18
  • @Spikolynn thanks! Although the question is already 3 years old, I'm sure the information there would be helpful for others facing the same situation as I was :-) (I have changed job a couple of times, and my current employer is not using Postfix) – pepoluan Sep 01 '14 at 00:50
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    MailScanner is mega-awesome, but the primary maintainer has retired and it isn't getting the focus that it once did. The complaints about postfix queue corruption are overblown. – chicks Sep 01 '14 at 02:24