[BlueOnyx:14644] Re: Frontend Mail Filter

[Gregg K]

How do you add these IPTables rules? I'm always a little cautious messing
with IPTables cause I've blocked myself a few times J


And then, to stop the scripts connecting via IP instead of using the MX
records -- I put IPTables rules in our BX servers that only accept TCP port
25 connections from our internal networks and from the CanIt server.  That
completely eliminated the problem with connections bypassing the CanIt
server.  But it does require that every domain on that BX server have their
mail going through the CanIt server (otherwise, the IPTables rules are a
headache). 




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