[76976] in North American Network Operators' Group
Re: Port 25 filters - how many here deploy them bidirectionally?
daemon@ATHENA.MIT.EDU (Bob Martin)
Sun Jan 9 11:17:46 2005
Date: Sun, 09 Jan 2005 10:17:27 -0600
From: Bob Martin <bob@buckhorn.net>
To: Suresh Ramasubramanian <ops.lists@gmail.com>
Cc: nanog@nanog.org
In-Reply-To: <bb0e440a0501090625648426df@mail.gmail.com>
Errors-To: owner-nanog-outgoing@merit.edu
Suresh Ramasubramanian wrote:
> .. and if it has been tried, have you noticed any issues with this?
>
We have been doing bidirectional port 25 filtering for sometime now. We
have not seen this behavior, nor anything like it.
-snip-
> Two posts about this in several months - but still, enough of a trend
> for me to wonder how widespread this behavior is.
>
If it works, it will become very wide spread before long.
This may or may not be related, but we have seen a sharp decline in spam
attempts from our dial up pool since Sept 2004.
Bob Martin
