Redirect all (non-rejected) spam to a special mailbox in sa-exim

Question

I'd like to redirect all spams (that weren't rejected outright) to mailbox of local user spam (i.e. deliver mail to spam user rather than to original local recipient).

I'm using sa-exim (exim 4 + spamassasin 3.2) on Debian (it's got its own exim4.conf.template convoluted config).

I've tried adding the following router (before exim's real_local):

 spams:
  debug_print = "R: spams $local_part@$domain"
  driver = redirect
  condition = ${if def:h_X-Spam-Flag {1}{0}}
  allow_fail
  allow_defer
  check_local_user
  domains = +local_domains
  data = spam@localhost

but it doesn't seem to be triggered at all.

Answer 1

Double check that the new router is being used by exim

grep spams /var/lib/exim4/config.autogenerated

Then do some debugging, something like:

cat message-with-header.txt | exim -bm -t -d+route

You should see it run through each router, so check if it runs yours and hopefully tell you why its not working (condition failed, earlier router already took the message, etc)

Answer 2

Using the following condition works fine for me:

  condition = "${if def:h_X-Spam-Flag: {yes}{no}}"