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Expand the docs for custom SA configuration

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Users regularly ask how to classify mails containing some keywords as spam.
Given that this usually indicates a misconfiguration in their DNS-Setup, and
the changes lead to more false positives than actually catching more spam
we should address this more explictly in the documentation.

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
This commit is contained in:
Stoiko Ivanov 2019-11-06 12:18:37 +01:00 committed by Thomas Lamprecht
parent 4ea3a20370
commit 833e1edcb1
2 changed files with 15 additions and 8 deletions
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1
asciidoc/asciidoc-pmg.conf
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@ -10,6 +10,7 @@ forum=https://forum.proxmox.com/[Proxmox Community Forum]
manmanual=Proxmox Mail Gateway Documentation
max-width=55em
spamassassin=https://spamassassin.apache.org[SpamAssassin(TM)]
spamassassin_dnsbl=https://cwiki.apache.org/confluence/display/SPAMASSASSIN/DnsBlocklists[SpamAssassin DNSBL documentation]
postfix=http://www.postfix.org[Postfix]
postfix_tls_readme=http://www.postfix.org/TLS_README.html[Postfix TLS Readme]
systemd=https://www.freedesktop.org/wiki/Software/systemd/[systemd]

22
pmgconfig.adoc
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@ -529,15 +529,21 @@ include::pmg.virusquar-conf-opts.adoc[]
Custom SpamAssassin configuration
---------------------------------
This is only for advanced users. To add or change the Proxmox
{spamassassin} configuration please login to the console via SSH. Go
to directory `/etc/mail/spamassassin/`. In this directory there are several
files (`init.pre`, `local.cf`, ...) – do not change them.
This is only for advanced users. {spamassassin}'s rules and their associated
scores get updated regularly and are trained on a huge corpus, which gets
classified by experts. In most cases adding a rule for matching a particular
keyword is the wrong approach, leading to many false positives. Usually bad
detection rates are better addressed by properly setting up DNS than by adding
a custom rule - watch out for matches to 'URIBL_BLOCKED' in the logs or
spam-headers - see the {spamassassin_dnsbl}.
To add your special configuration, you have to create a new file and
name it `custom.cf` (in this directory), then add your
configuration there. Be aware to use the {spamassassin}
syntax, and test with
To add or change the Proxmox {spamassassin} configuration please login to the
console via SSH. Go to directory `/etc/mail/spamassassin/`. In this directory
there are several files (`init.pre`, `local.cf`, ...) – do not change them.
To add your special configuration, you have to create a new file and name it
`custom.cf` (in this directory), then add your configuration there. Be aware to
use the {spamassassin} syntax, and test with
----
# spamassassin -D --lint