Re: [Exim] 4.30-6.amwoody.1 + spamassassin problem

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Autor: Tor Slettnes
Data:  
Dla: Andy Firman
CC: Exim Users
Temat: Re: [Exim] 4.30-6.amwoody.1 + spamassassin problem
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On Mar 15, 2004, at 14:13, Andy Firman wrote:
> On Mon, Mar 15, 2004 at 11:03:49AM -0800, Tor Slettnes wrote:
>> Let me know if you want me so send you config snippets for Exim and
>> SpamAssassin, and sample (Sieve) filters for mail sorting.
>
> Yes please.


See below.

> Since I am running exim4-daemon-heavy, I only need to add some things
> into the /etc/exim4/conf.d/acl files to get this going right?
> Mainly the 40_exim4-config_check_data file?


Correct.

> After reading the exiscan-acl-spec.txt file, it seems I can continue to
> use my installed spamassassin, but I am not sure how to get exim4 to
> actually call SA to do the spam work.


Exiscan-ACL talks to your SpamAssassin daemon (spamd) on localhost:783.
Be sure to edit /etc/default/spamassassin, so that:
    ENABLED=1


Then (re)start SA:
    /etc/init.d/spamassassin restart



> Also, when you change some of those files in the conf.d directory,
> one needs to run update-exim4.conf right?


This is done automatically when you restart exim:
    /etc/init.d/exim4 restart



> And is it necessary to do /etc/init.d/exim4 restart ??


Yep.

> Any info you can send me, or the list, would be great.



- First, customize the SA report template so that it looks "good" in
the mail headers once you add it via the Exiscan-ACL "$spam_report"
variable.

/etc/spamassassin/local.cf:
     +--------------------------------------------------------------
     | ...
     | clear_report_template
     | report "_YESNO_, hits=_HITS_, required=_REQD_, version=_VERSION_;"
     | report "_TESTSCORES(, )_"
     | ...
     +--------------------------------------------------------------


- Ensure that you run the SA daemon, 'spamd'.

/etc/default/spamassassin:
     +--------------------------------------------------------------
     | ...
     | ENABLED=1
     | ...
     +--------------------------------------------------------------



- Start/restart SA:
     # /etc/init.d/spamassassin restart



- Configure the 'acl_check_data' ACL in Exim to use Exiscan-ACL:

/etc/exim4/conf.d/acl/40_exim4-config_check_data:
     +--------------------------------------------------------------
     | ...
     |    # --- BEGIN EXISCAN configuration ---
     |
     |    # Do not scan messages submitted from our own hosts
     |    # and locally submitted messages. Since the DATA ACL
     |    # is not called for messages not submitted via SMTP
     |    # protocols, we do not need to check for an empty
     |    # host field.
     |    accept hosts = 127.0.0.1:+relay_from_hosts
     |
     |    # Reject messages that have serious MIME errors.
     |    # This calls the demime condition again, but it
     |    # will return cached results.
     |    deny  message = Serious MIME defect detected ($demime_reason)
     |          demime = *
     |          condition = ${if >{$demime_errorlevel}{2}{1}{0}}
     |
     |    # Unpack MIME containers and reject file extensions
     |    # used by worms. Note that the extension list may be
     |    # incomplete.
     |    deny  message = We do not accept ".$found_extension"
attachments here.
     |          demime =
bat:btm:cmd:com:cpl:dll:exe:lnk:msi:pif:prf:reg:scr:vbs:url:zip
     |
     |    # Accept messages that are too large, without scanning them.
     |    # accept condition = ${if >={$message_size}{512k}{1}{0}}
     |
     |    warn message   = X-Spam-Score: $spam_score
     |        spam       = mail:true
     |
     |    warn message   = X-Spam-Status: $spam_report
     |        spam       = mail:true
     |
     |    accept
     |        spam       = mail
     |        delay      = 20s
     |        control    = fakereject
     |        logwrite   = :main: Classified as spam (score $spam_score)
     |        logwrite   = :reject: SPAM: $spam_report
     |
     |    # accept otherwise
     |    accept
     |        logwrite   = :main: Classified as ham (score $spam_score)
     |
     |    # --- END EXISCAN configuration ---
     +--------------------------------------------------------------


(Note that using the 'spam = ' ACL condition several times does not
cause several SA lookups - the results are cached so long as the same
user ('mail') is being used each time).


- Setup a default mail filter for each user, to sort spam into a "Junk"
mailbox. I use the Cyrus IMAP server (cyrus21-*.deb), and thus
install the following default Sieve (RFC3038 --
http://www.cyrusoft.com/sieve/) filter for each user.

     +--------------------------------------------------------------
     | # Sieve filter
     |
     | require "fileinto";
     |
     | if header :matches "X-Spam-Status" "Yes*"
     |         { fileinto "INBOX.Junk"; }
     | else
     |         { keep; }
     +--------------------------------------------------------------


You can also use:
- "procmail" -- create a .procmailrc in each user's home directory
- An exim filter -- create a file named .forward in each user's home
directory, containing the string "# Exim filter" on the first line.
- A sieve filter for Exim -- create a file named .forward in each
user's home directory, containing the string "# Sieve filter" on the
first line.

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