Richard Hobbs wrote:
> Some users do not want spam checking to be done at all, but other users
> would like it to be done. The part I'm having trouble with is understanding
> how to get exim to use spamassassin at all, let alone for some accounts and
> not others.
Exim's spec.txt, 40.2 is quite verbose on this.
spamd listens by default on 127.0.0.1:783, and Exim uses this if you
have a spam condition in your ACLs.
The exact setup depends on you requirements and can be arbitrarily
complex. Mine is:
> ### check SMTP DATA
> acl_check_data:
>
> # Do not scan messages submitted from our own hosts
> # and locally submitted messages.
> accept hosts = 127.0.0.1 : +relay_from_hosts
>
> # accept if authenticated
> accept authenticated = *
>
> # Reject high scored spam messages
> deny message = This message scored $spam_score spam points. Congratulations!
> condition = ${if <{$message_size}{200k}{1}{0}}
> spam = nobody:true
> condition = ${if >{$spam_score_int}{100}{1}{0}}
> delay = 30s
>
> # put spam header into message
> warn log_message = Classified as spam (score $spam_score)
> condition = ${if <{$message_size}{200k}{1}{0}}
> spam = nobody
> delay = 10s
> control = fakereject/This message scored $spam_score spam points. Congratulations!
>
> warn condition = ${if <{$message_size}{200k}{1}{0}}
> spam = nobody:true
> message = X-Spam-Status: ${if >{$spam_score_int}{50} {Yes}{No}}, $spam_score\n\
> X-Spam-Report: $spam_report
(Don't forget "acl_smtp_data = acl_check_data" in the main config!)
Scores above 10 rejects the message, scores between 5 and 10 accept it
(but still reject it in SMTP) and allow the users to filter in their MUA.
> Once we know spamc can successfully talk to spamd which successfully detects
> spam, how can I let individual users enable or disable spam checking on
> their account as they please?
Depends on how your users are set up on your machine. If they are all
system users, you might e.g. check for $HOME/.spamcheck in ACL conditions:
condition = ${if {exists {/home/$local_part/.spamcheck})}
(note that Exim needs rx rights to the users' home directories then)
or put all spamassassin-users in a file /etc/exim/spam_free_users:
local_parts = /etc/exim/spam_free_users
just make sure the additional condition is put _before_ the spam condition.
