Stealth Blocking

Steve Sobol sjsobol at
Thu May 24 21:50:39 UTC 2001

Shawn McMahon wrote:

> > TCP rate-limiting on outbound traffic to *:25 would also be extremely
> > effective, particularly on unclassified customer traffic, and without the
> > heavy-handed nature of denying all dial-up traffic. Rate-limiting doesn't
> > interfere with low-volume legitimate mail, but it really cramps spam.
> It interferes heavily with transmission of large files via email, though,
> and this *IS* a valid use of service.

The transmission of large files is not a valid use of email.

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