On 17/08/2019 23:09, pille via Exim-users wrote:
> i've setup my mail system to use multiple spam engines (spamassassin and
> rspamd), similar to what was described in
> https://lists.exim.org/lurker/message/20170620.144216.2289dbff.en.html
...
>
> is there any way to detect, if the second spam engine failed?
> or is it possible to reset/unset the spam variables before the second run?
My solution is below. Probably it can be improved but you can use it
for hints. I have removed some other checks for clarity which could be
why I have sub acls where none is apparently needed.
I have two acls that do the checks: acl_rspamd and acl_sa. Variables
acl_m_rspamd and acl_m_sa are flags that store successful execution of
the spam check. I normalise (or bias) spam_score_int to 100 and store
as acl_m_rspamd_score and acl_m_sa_score.
I call these from acl_spam with warn so they just set values. Subsequent
warn, defer, deny use the values set previously.
acl_spam is called by acl_check_data with other checks not shown,
acl_rspamd:
warn
set acl_m_spamengine = 127.0.0.1 11333 variant=rspamd
spam = nobody:true
set acl_m_rspamd = 1
set acl_m_rspamd_score = ${eval:($spam_score_int*100)/120}
accept
acl_sa:
warn
set acl_m_spamengine = 127.0.0.1 783
spam = nobody:true
set acl_m_sa = 1
set acl_m_sa_score = ${eval:($spam_score_int*100)/70}
accept
acl_spam:
warn
set acl_m_rspamd_score = 0
set acl_m_rspamd = 0
acl = acl_rspamd
warn
set acl_m_sa_score = 0
set acl_m_sa = 0
acl = acl_sa
defer
condition = ${if and{{eq{$acl_m_rspamd}{0}} {eq{$acl_m_sa}{0}}} }
message = Please try again later, spam check is not available
deny
set acl_m_score =
${eval:($acl_m_rspamd*$acl_m_rspamd_score+$acl_m_sa*$acl_m_sa_score)/($acl_m_rspamd+$acl_m_sa)}
condition = ${if >={$acl_m_score}{100}{true}{false}}
message = Message refused as high probability of spam
warn
...
accept
acl_check_data:
...
deny
!acl = acl_spam
...
