[courier-users] Spamfilter, Blacklists, Blocking

I have installed Courier 0.47 (the Debian Sarge packages) MTA with no
local users and no local virtual users.

Courier accepts mail for certain domains and sends them to the
recipients as defined in the aliases file.

Example: The Domain my.com is in the acceptmailfor.dir/domains and the
hosteddomains/domains and defaultdomain file. Mail sent to foo@my.com is
sent directly to bar@gmx.at - and so on.

I have configured some BOFH options (opt BOFHBADMIME=accept), but
basically it is an out-of-the-box configuration with needed changes
(postmaster accounts, batchsize=1, etc.).


Now here are my questions:

1.) Can I use a SPAM filter and does this filter prevent mail identified
as SPAM from being forwarded (according to the aliases configuration)?
Is this possible via debian packages or do I have to compile a tarball?

2.) Can I block certain IPs from delivering mails to accepted domains
and how do I do this? Can this be automated?

3.) Can I block certain "From" adresses and/or mails with certain
"subjects" as well?


I changed the file esmtpd as follows:
[...]
BLACKLISTS="-block=blackholes.mail-abuse.org,BLOCK
-block=relays.mail-abuse.org,BLOCK"
[...]
ESMTPAUTH="LOGIN"
[...]
ESMTPAUTH_TLS="LOGIN"
[...]

Nevertheless I am still getting much SPAM and often from the same
address - does the blacklist really work? How often is this list
updated? Where is it stored/cached? Do I have to enable this?

I looked through all of the man pages and the online manual and some
other courier sites and could not find a solution that worked for my
(rather primitive) configuration. Any help is appreciated. :)

--
Greetings, Bernhard Lukas



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