[Kolab-devel] New SMTPD Policy

Gelpi Andrea liste at gelpi.it
Mon Jun 25 10:28:05 CEST 2012

	I just installed a new Kolab server V 2.3.4 for production environment. 
I put it in production next weekend.

The server will be multi domain and I'm trying to implement a Policy 
different from domain to domain.

For example I have customers from a domain that need to have all mail 
coming from Russia to be considered valid ones.
Customers of others domains wants a filter to block spam from Russia.

Some other customers ask that every recipient in mail they send will go 
in a permanent white list. So I need a different white list for every 
mail defined in kolab for that domain.

The actual filters and policy in Postfix don't have a solution, for what 
I know.
Postfix check_client_access, check_helo_access, check_sender_access can 
help but in a site general mode, not on a domain or single email mode.
I have a look at policyd, but it seems to have the same limits.
I don't know if kolabpolicy could help.

I looked around and found nothing that could help me.
So I think to write a new policy that use a file or a db with 4 
information to correlate:
Client IP

My idea is to check not only one field at a time as can do actual filter 
in postfix, but to aggregate two or more during check.

In postfix source code there is a simple example of greylist policy.

I think to modify that code to implement a new policy, with a higher 

Do you know a better solution, or something already done?
Any idea will be appreciate.

P.S.: I apologize for my poor English.

ing. Andrea Gelpi
La Terra non la abbiamo ereditata dai nostri avi,
ma la abbiamo presa in prestito dai nostri bambini.
We do not inherit the Earth from our parents,
but borrow it from our children.

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