On 4 Dec 2006 at 10:03, [log in to unmask] wrote:
>Lately I have been seeing the following error messages for several
>subscribers on our ListServ. The emails do not seem to match up and I am
>
>Err First Last Address
>--- ----- ----- -------
>1 11/29 11/29 [log in to unmask] Last error: smtp;550 5.7.1 Unable
>to deliver to <[log in to unmask]>
According to RFC1893:
X.7.1 Delivery not authorized, message refused
The sender is not authorized to send to the destination.
This can be the result of per-host or per-recipient
filtering. This memo does not discuss the merits of any
such filtering, but provides a mechanism to report such.
This is useful only as a permanent error.