[EXIM] filter pipe example sought

I need to understand the syntax of the pipe command in the exim filter
file better, especially the syntax of an example script called via the
pipe. (i've read the filter.txt doc many times).. could someone send
me examples? My application is to block mail from a particular site
and send a canned reply to $header_from explaining my site's
policy.. I know that many $header_from's will be bogus, but I hope it
may still be useful for some users at heavy spam-generating sites to
know why they can't get through.

thanks.
--Rob

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Rob Lingelbach          |  2660 Hollyridge Dr., Los Angeles, CA 90068
rob@???         |"I care not much for a man's religion whose dog or 
rob@???            |  cat is not the better for it."  --Abraham Lincoln
rob@???                    KB6CUN   http://www.alegria.com

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