.forward file / do not leave messages on server

[Zbigniew Szalbot]

Hello,

How do I specify in a .forward file that forwarded messages should not 
be kept on server?
user adres at domain.tld just gets the mail forwarded but also leaves a 
copy on server.

Thank you!
-- 
Zbigniew Szalbot
www.lc-words.com
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