[Exim] ACL rule perfection

Hello all,

I'd like to request for some help with this condition:
Sp far it doesn't seem to work at all.

condition     = ${if and { \
                         {eq {$sender_helo_name}{outblaze.com}}\
                         {match {$h_Received:}{.*mr.outblaze.com}} \
                         }\
                         {yes}{no}}

Is it correct, especially with regard to the $h_Received?
Is it wise to AND or OR the two sub conditions? I am think now that they
may not always be true so OR-ing is much likely to work better than
AND-ing.

        cheers
       - wash
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