Outgoing SMTP Servers

Wed Oct 26 23:42:14 UTC 2011

> 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.