thank you for the quick reply.
Can I ask some point?
So if I edit /var/vmail/.mailfilter , will this stay after updating ispconfig?
For the parameters inside, as I am just a very basic coder ;-), do I understand correct:
$RECIPIENT contains the full email-address of the main mailbox??
Is the following syntax correct, whe I want to add a rule only for one specific domain?
if ("$HOST" == "myspecialdomain.de")
Kind regards an a nice day!!