Filters to use with Weasel

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BanURLs
BlockMyIP
CopyMail
FromBadUser
MultiFilter
phpFilter
PostmasterCheck
PMMFix
Junk filter
Virus scan

On other pages

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This page lists some filters that can be used with Weasel. Most of the filters are "production" filters that you can install and use to do real work. Where source code is included, you can also use the filters as demonstrations of how to write your own filter.

The listing of a package on this page does not imply that it is automatically available to all registered users of Weasel. Most of it is freeware, but I might also list some shareware. The conditions of use of each package remain, as always, with the original supplier of the software.

There are some filters on os2site that are not listed on this page, because I haven't checked them, but are probably also OK to use.

BanURLs

Author: Peter Moylan
Category: Freeware
File: banurls.zip.

A filter that rejects mail that contains an http:// reference to a URL that is in a "banned" list. A sample banned list is included, but you should probably build your own because the spammers keep moving. The filter also rejects the mail if there are any non-7-bit characters in the header lines - something that should never occur with legitimate mail.

BlockMyIP

Author: Peter Moylan
Category: Freeware
File: blockmyip.cmd.

A stage 1 filter to reject mail that pretends to come from your own address. Legitimate mail should not come from your own address, except in unusual cases such as when you are running two servers.

CopyMail

Author: Peter Moylan
Category: Freeware
File: copymail.cmd.

A filter to take a copy of each incoming message and store it in an "archive" directory.

FromBadUser

Author: Peter Moylan
Category: Freeware
File: FromBadUser.cmd.

A stage 2 filter that rejects MAIL FROM addresses of the form baduser@yourdomain, where yourdomain is one of your own domains and baduser is not a valid username in that domain. That helps block the spammers who are pretending to be sending from one of your domains.

MultiFilter

Author: Peter Moylan
Category: Freeware
File: multifilter.cmd.

A filter to call a sequence of other filters. You can use this if you have several filters you want to run.

phpFilter

Author: Andrea Brancatelli
Category: Freeware
Download: From the author's web site.
Prerequisite: PHP, which you can find at http://silk.apana.org.au/. You also need a web server and some sort of database system - see the internal documentation for details.

I don't understand much about PHP myself, but I gather that this is a multipurpose filter that adds multidomain support, mailbox limits, and management via the web.

PostmasterCheck

Author: Peter Moylan
Category: Freeware
File: postmastercheck.cmd.

You need this filter if you have enabled "mark failures as suspect" in the Options 2 page of Weasel Setup. If you install it as a stage 4 filter, it will copy the suspect mail to a "suspect" subdirectory, where you can inspect it to see whether this is legitimate mail.

PMMFix

Author: Peter Moylan
Category: Freeware
File: pmmfix.cmd.

Alters some header lines of the mail, to compensate for cases that PMMail 1.96a does not handle properly.

Junk mail filter

Author: David Hough
Category: Freeware
File: weaselfilter307.zip. Note that Hobbes might have a later version.

A program that checks the header lines in incoming mail, and rejects mail according to rules that you can set up.

Virus scan

Author: John Bijnens
Category: Article, in the form of a PDF file
File: scan4virus.pdf

A description of how to create a Weasel filter that will invoke Norman antivirus to do virus checking on incoming mail. I gather that John has now developed a more sophisticated version, so I'll update this entry once I've found the details.


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Author: Peter Moylan
Last updated: 18 December 2016