[Exim] effective use of .forward files

I'm trying to make a rule that checks incoming mail headers by using the
following rule:

if $h_from: contains "email1@???" or
    $h_from: contains "email2.com" or
       ...
then
    deliver emailaddress1@domain
    deliver emailaddress2@domain
endif

The structure works, but is there a more effective method of creating the
header checking part?

Thanks,
Scott