Rod Dorman:
> On Monday, March 5, 2012, 09:53:31, /dev/rob0 wrote:
> > ...
> > Another WAG: maybe your ISP's upstream provider got tired of
> > complaints and implemented this redirection upstream. This would
> > explain why the ISP would not know.
>
> I would be horrified is this turned out to be the cause.
>
> Without deep packet inspection there would be no way to distinguish
> between SMTP packets originating from the ISP's MTA vs. his MTA.
Are you thinking of an ISP with the entire network behind a NAT router?
Wietse
