North American Network Operators Group

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Re: MSRFCs versus RFCs?

  • From: Jim Hickstein
  • Date: Mon Dec 02 23:10:59 2002

RFC-2505 (BCP-30) talks about which return codes to use, among other things. Not a direct hit, perhaps. RFC-1891 (DSNs) may also have something.

You want an RFC-lawyer. Given another hour or so, I could probably come up with the necessary citation, either in the RFCs themselves or in other suitably authoritative-sounding sources. But my pro-bono time has run out for today. :-)

Or you could just ask Eric.

ahead) If I send an email to [email protected] and spoof the
Mail From as [email protected] to an Exchange Server
setup in this manor, the Exchange server will bounce an email
to the [email protected] While this is all fine and
dandy, if a person(s) decides to use this as a mailbomb method
and exploit this, its rather simple to do. So, in short I am
aguing that
1> Mail destine for a domain not handled should be 550 Denied.
2> None Delivery Reports should only be sent for Domains Handled.
3> That a Firewall should not be doing Domain checking for SMTP

What I am at a loss for is RFCs that explicitly state this, that
is NDR for other domains, and accepting for other domains.