And, of course, servers that don't exist except in the fertile imagination of some
spammer are unlikely to accept any NDRs.
Peter
-----Original Message-----
From: Randal, Phil [mailto:[EMAIL PROTECTED]]
Sent: Monday, March 04, 2002 9:10
To: Exchange Discussions
Subject: RE: testing relay
Read http://www.faqs.org/rfcs/rfc2822.html and digest carefully.
Emails with a "From: <>" header are delivery notification messages.
RFC2822 says mailers must accept these messages (they can, if I
recall correctly, do what they like with them). There are an
awful lot on non-RFC2822-compliant mail servers out there.
Phil
---------------------------------------------
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK
> -----Original Message-----
> From: James Lavoie [mailto:[EMAIL PROTECTED]]
> Sent: 04 March 2002 15:37
> To: Exchange Discussions
> Subject: testing relay
>
>
> I followed the Microsoft article on preventing mail relay on
> exchange 5.5
> and went to a couple different sites that check your server
> for you to see
> if relaying is open, BUT......... I get outbound mail failure
> notifications
> from email that was not sent out by any of our employees....
> Reason for
> error is "message timeout" and I'm unsure if it is a misleading error
> message. Reason for failure should be that relaying is prohibited? I'm
> wondering if alas relaying is still possible.
> The from: address on these messages is invariably <>
> Anyone have input?
>
> Thanks,
> Jay
>
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