[exim] Passing ACL variables thru ACLs

Hi folks,

in preparation for checking mails to majordomo for having "text/plain"
body parts only I've the following in my ACLs:


check_recipient:

  warn    recipients = majordomo@???
          set acl_m0 = majordomo

check_mime:

  warn    condition = ${if eq {$acl_m0}{majordomo}{yes}{no}}
          logwrite = MAJORDOMO: CS=$mime_charset, CT=$mime_content_type, \
                     CE=$mime_content_transfer_encoding, FN=$mime_filename

accept



But this doen't work, nothing is written to the log.
Any pointer to what I've missed are welcome.


--Frank Elsner