John Tolmachoff
IT Manager, Network Engineer
RelianceSoft, Inc.
Fullerton, CA  92835
www.reliancesoft.com

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Sanford Whiteman
Sent: Wednesday, October 16, 2002 10:27 AM
To: John Tolmachoff
Subject: Re[2]: [IMail Forum] IMail with Firewall/NAT

> Then I guess Yahoo is broken too?

Parsing  out  an  IPv4-like  domain  and  treating  it as if it were a
domain-literal address is a nicety that they (and IMail) offer, but in
RFC terms they are twisting the meaning of the original address to fit
a routable purpose, rather than bouncing it immediately.

This is akin to many mail servers' translation of a double-@ recipient
(a@b@c)  into  a  source-routed  percent hack (a%b@c), then making the
decision  to  route  it in accordance with certain generally accepted,
but not RFC-mandated, principles.

Both situations require that all source, intermediate, and destination
MTAs "look the other way." "Broken" might indeed be too strong a word,
then--maybe  "trusting"  is  better, but we all know how far that gets
you in the mail world...

-Sandy


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