Hi,
I need some advise on a task I am working on towards spam control and
bandwidth saving. I am going to have a dedicated server hosted somewhere
upstream and this server is going to be my highest priority MX for several
thousand domains.
Basically, I want to save as much bandwidth as possible by stopping spam
and viruses upstream.
There is not going to be any local deliveries on this server though.
What I want to do is to "let it know" all the recipient addresses on
the thousand domains. I'll be synchronising the list of recipients to
this server at good intervals to keep the recipients list updated.
Any mail that is not addressed to the "known" recipients need to be
rejected out there, just like the identified spam and virii. I just
need to get advise/warnings on:
1. What is the dandiest way to do this? After all dnsbl, I want to
accomplish all the checks at acl_smtp_rcpt and reject any unknown
recipients. Are there are pitfalls I should watch for?
2. What rule options would the admins here consider the most efficient
and effective for such a task?
All advise/pointers will be highly appreciated.
cheers
- wash
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