Urgent pleqse --- Change rewrite_header Subject ofr one domain

[Noc Phibee]

Hi

please a small question but urgent ! :

Actually, all spams are Tagged into the subject :
   rewrite_header Subject *****SPAM*****
It's on a relay server ..

Can i pat a different "rewrite_header Subject" speicifed for one domain ?

Exemple:

* => rewrite_header Subject *****SPAM*****
domain.com => rewrite_header Subject *****PUB*****

Thanks for your help