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Exchange 2003 SP2 SPAM Filter - The Quick Guide

Online Sources:

Barracuda Reputation Block List (BRBL) -

Exchange Server Changes:

Exchange System Manager -> Global Settings -> Internet Message Formats -> Default * -> Properties -> Advanced -> Disable "Allow non-delivery reports"

Exchange System Manager -> Global Settings -> Message Delivery -> Properties

Sender Filtering -> Enable "Filter messages with blank sender"
Sender Filtering -> Enable "Drop connection if address matches filter"

Connection Filtering -> Add:

Display Name:
DNS Suffix of Provider:
Custom Error: The IP address %0 was rejected by the Realtime Block List provider %2.

Display Name: Barracuda Reputation Block List (BRBL)
DNS Suffix of Provider:
Custom Error: The IP address %0 was rejected by the Realtime Block List provider %2.

Recipient Filtering -> Enable "Filter recipients who are not in the Directory"

Exchange System Manager -> Servers -> Server -> Protocols -> SMTP -> Default SMTP Virtual Server -> Properties:
General -> Advanced -> Edit -> Enable all the Apply's
Access -> Relay -> "Only the list below" -> Add your local internal IP's and untick "Allow all computers"
Messages -> "Send copy of Non-Delivery Reports to:" Somebody real

Please Note:
- These are notes only and are for summary only. For details on these settings, please Google.
- No guarantees, warranty's, support or coffee. Just notes.


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