mailfilter to identify and mark spam
Project homepage: https://www.mimedefang.org/
Description
MIMEDefang is a framework for filtering e-mail. It uses Sendmail's
"Milter" API, some C glue code, and some Perl code to let you write
high-performance mail filters in Perl.
People use MIMEDefang to:
- Block viruses
- Block or tag spam
- Remove HTML mail parts
- Add boilerplate disclaimers to outgoing mail
- Remove or alter attachments
- Replace attachments with URL's
- Implement sophisticated access controls.
You're limited only by your imagination. If you can think of it and code
it in Perl, you can do it with MIMEDefang.
Package information
- Ports path
- mail/mimedefang
- Package architecture
- amd64
- Maintainer
- Giovanni Bechis <giovanni@openbsd.org>
- Categories
- Available flavors
- None listed
Ports list build and test dependencies as well as runtime dependencies. pkg_add selects those needed for installation.
Direct dependencies
Library
Runtime
- mail/p5-Mail-Tools
- mail/p5-MIME-tools
- security/p5-Crypt-OpenSSL-Random
- security/p5-IO-Socket-SSL
- sysutils/p5-Unix-Syslog
- archivers/p5-Archive-Zip
- www/p5-HTML-Parser
Build
- mail/p5-Mail-Tools
- mail/p5-MIME-tools
- security/p5-Crypt-OpenSSL-Random
- security/p5-IO-Socket-SSL
- sysutils/p5-Unix-Syslog
- archivers/p5-Archive-Zip
- www/p5-HTML-Parser
Test
OpenBSD README
This README contains unresolved ports variables; replace them before using its commands.
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Post-installation steps
=======================
Register the mimedefang milter with sendmail(8) by adding the following
to your .mc file:
INPUT_MAIL_FILTER(`mimedefang', \
`S=local:/var/spool/MIMEDefang/mimedefang.sock, \
F=T, T=C:15m;S:4m;R:4m;E:10m')dnl
Then re-generate your .cf file.
When using administrator notifications, it is advised to add the
"_mdefang" user to the list of users that are allowed to set their
envelope "from" address to a different user. This is done in:
${SYSCONFDIR}/mail/trusted-user
Improving performance
---------------------
On a busy mail server, it is advised to have the spool directory in
virtual memory (i.e. ramdisk). This can be achieve by adding the
following line to fstab(5):
swap /var/spool/MIMEDefang tmpfs rw,nodev,nosuid,-s256M,-u570,-g570,-m0750 0 0
This will create a 256M tmpfs filesystem under /var/spool/MIMEDefang.
SpamAssassin
------------
SpamAssassin can be used by mimedefang(8) in which case some maintenance
tasks are required and cron(8) jobs must be setup in root's crontab(5):
- Automating SpamAssassin rule updates:
0 0 * * * PATH=${PATH}:${LOCALBASE}/bin; ${LOCALBASE}/bin/sa-update && ${RCDIR}/mimedefang_multiplexor reload >/dev/null
- Synchronizing the journal data into the Bayes databases:
30 0 * * * PATH=${PATH}:${LOCALBASE}/bin; su -s /bin/sh _mdefang -c "${LOCALBASE}/bin/sa-learn --force-expire >/dev/null"
IP validation header
====================
To retain relay's IP address information between Mail eXchangers, an
identical ${SYSCONFDIR}/mail/mimedefang-ip-key must be installed on all
relays. The content of this file is generated using:
# /usr/local/share/examples/gen-ip-validator.pl
Start-up order
==============
Be sure to start mimedefang_multiplexor before mimedefang in rc.local(8).
# rcctl order mimedefang_multiplexor mimedefang
Used by (1 dependency relationships)
Includes library, runtime, build and test dependencies.