[Mimedefang] Blocking spam senders using IPTables?

[Joseph Brennan]

--On Tuesday, November 2, 2004 3:51 PM +0000 Paul Murphy 
<pmurphy at ionixpharma.com> wrote:

> We're dealing with spammers who either ignore the 5xx response and
> keep trying,


Outlook does that too.  You can end up with tens of thousands of
connections a day trying to send the same couple of messages,
never mind the 5xx responses.


Joseph Brennan
Academic Technologies Group, Academic Information Systems (AcIS)
Columbia University in the City of New York