preventing backscatter at the source

[Hugo van der Kooij]

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Mark Nienberg wrote:
| Steve Freegard wrote:
|
|> 2)  Don't run a secondary MX unless it is configured to reject exactly
|> as the primary.
|> A secondary MX delivering to the primary MX which does an SMTP
|> rejection will cause the secondary MX to 'bounce' the message which is
|> backscatter.
|
| Uh oh, this is a bit harder.  I have my ISP functioning as my secondary
| MX, so it really isn't under my control.  I guess I could ask them if
| they use milter-ahead or some other method.

I have seen one ISP do a smart thing here. Their SMTP backup servers
will monitor your system. Unless your system is down there is no need
for them to accept email on your behalf.

Hugo.

- --
hvdkooij at vanderkooij.org               http://hugo.vanderkooij.org/
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	A: Yes.
	>Q: Are you sure?
	>>A: Because it reverses the logical flow of conversation.
	>>>Q: Why is top posting frowned upon?

Bored? Click on http://spamornot.org/ and rate those images.

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