[145931] in North American Network Operators' Group
RE: Outgoing SMTP Servers
daemon@ATHENA.MIT.EDU (up@3.am)
Wed Oct 26 19:43:12 2011
In-Reply-To: <AF24AE2D4A4D334FB9B667985E2AE763018E4876@mail1-sea.office.spectrumnet.us>
Date: Wed, 26 Oct 2011 19:42:14 -0400
From: up@3.am
To: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> On our retail footprint we block outbound traffic from customers with dynamic IPs
> towards port 25, our support tells them to use their ISP's port 587 server....
> That being said, since all of our home users have 50 mbit/sec or greater upload
> speeds we are pretty paranoid about the amount of spam that could be originated.
>
> We don't block anything on static assignments. Honestly, even as a very geeky
> user, I probably would not have noticed the block and I can confirm that it is
> massively important to lowering our spam footprint as a network.
>
> I asked our support people, and none of them had ever really had an issue with
> this policy in terms of keeping customers. I agree with Ricky's current comment
> on this thread, blocking is unfortunately necessary on the modern consumer
> portions of the internet.
Exactly. Just like not having wide open SMTP relays became "unfortunately
necessary" over a dozen years ago. It's just the way it is and there is a
solution for it.
