Take a good look at RFC 2821 (http://www.faqs.org/rfcs/rfc2821.html).
"If there is a delivery failure after acceptance of a message, the
receiver-SMTP MUST formulate and mail a notification message. This
notification MUST be sent using a null ("<>") reverse path in the
envelope. The recipient of this notification MUST be the address
from the envelope return path (or the Return-Path: line). However,
if this address is null ("<>"), the receiver-SMTP MUST NOT send a
notification."
It would appear that many mailers are misconfigured when it comes to
handling "From: <>".
Cheers,
Phil
---------------------------------------------
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK
> -----Original Message-----
> From: Bill Lambert [mailto:[EMAIL PROTECTED]]
> Sent: 19 October 2001 17:18
> To: Exchange Discussions
> Subject: Understanding Non Delivery Message
>
>
> I'm getting messages periodically when mail is undelivered.
> I'm wondering
> why the "From" is showing only <>. I've looked at the IMS
> queues but there
> were no further details.
>
> I'm new to Exchange, obviously.
>
> Thanks for any help.
>
>
> Bill Lambert, Mcp, Mcse
> Endoxy Healthcare
> 847-941-9206
> [EMAIL PROTECTED]
>
>
>
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