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North American Network Operators Group

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RE: IETF SMTP Working Group Proposal at

  • From: Robert Blayzor
  • Date: Wed Aug 21 10:31:35 2002

>  I'd like to be able to publish DNS records announcing my 
> domain's *outbound*
> mail servers, with nice abbreviated forms to say "they're the 
> same as my
> inbound (MX) records" or "any IP in x.y.z/24".  Then 
> cooperative ISPs (like say
> America Online) could refuse any email from my domain that 
> originated from some
> random cable modem, instead of accepting it and then flooding 
> me with 20000
> bounce messages.

It's almost to the point to where mail servers need their own
"registrar", sort of the way domains are tracked now, track mail
servers.  Give mail server admins the option to accept mail from
registered mail servers only or from any mail server.  Of course there
would need to be a ramp up period, like six months to a year, to make
sure all of your mail servers are registered.  And of course one should
only be able to register mail servers if the IP space is actually SWIP
to them.  If the IP space is NOT SWIP, it would need to be registered by
the customer ISP or via owners rwhois server.  Just my $.02; for what
it's worth.... 

Robert Blayzor, BOFH

When all else fails, let a = 7.  If that doesn't help, then read the

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