Procmail

:0 hc
* ! ^From: .*from@example.com.*
* ^To: .*to@example.com.*
! transfer@example.com

:0 c
* ! ^From: .*from@example.com.*
! transfer@example.com

:0 fw
* ! ^X-Spam.*
| spamassassin

:0
* ^X-Spam-Status: Yes
$MAILDIR/.Spam/

Daiphys is a professional-service company for research and development of leading-edge technologies in science and engineering.
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