On Tue, Sep 03, 2002 at 12:06:21PM +0800, Suresh Ramasubramanian wrote:
> steven@??? (Steven Christensen) [Tuesday, September 03, 2002 11:24 AM]:
>
> > Hmm... that's interesting. If this is a standard (and I did indeed
> > find it in RFC 2421), then it looks like BellSouth is doing something
> > non-standard. They are rejecting DSN/NDN messages to their servers.
> > Are they allowed to do this (per RFC) ?
>
> There is an event where exim will reject MAIL FROM:<> - where the sending
> domain does not resolve in DNS at all.
Mmmh, that depends on the settings (that's not true by default), and I know
exim 4 actually rejects the RCPT TO, not the MAIL FROM.
I'm not too sure about exim 3 anymore.
Either way, you're not rejecting MAIL FROM:<>, you're rejecting any from and
to.
RFCs conveniently do not deal with RBLs and other checks that lead you to
refuse SMTP connections.
You could argue that rejecting any mail violates RFCs, but quite frankly, I
could argue back the other way :-)
Either way, with today's internet, everyone interprets this in slightly
different ways and does what seems best for his/her site.
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
.... what McDonalds is to gourmet cooking
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