www4mail now supports the following commands which can be used to 
prevent it from processing your signature or other unnecessary
data

Example

http://www.ictp.trieste.it
end

ANY JUNK HERE
http://www.xyz.com

In the above example all lines after the end line are ignored

other possible end patterns include:
 
--
--- Pergasus
regards,
cheers,
==================================================
--------------------------------------------------


Note: Please ensure that the first entry of your submission is not 
one of the end pattern.

SEE ALSO
help quota