Quoting Claydon, Tom [EMAIL PROTECTED]:
We are considering filtering outbound SMTP traffic from our ISP
customers, except from our own mail servers, to help reduce the amount
of spam originating from our network. How successful/unsucessful has
implementing outbound SMTP filtering done in
What about rate limiting SMTP traffic rather than blocking it? That
could allow legitimate use for most private customers, while
preventing bulk traffic.
Comcast has been doing something like that, looking for spikes of SMTP
connects and blocking when they see them, done at the IP level. I
Claydon, Tom wrote:
It depends on your customer base. For residential customers, filtering
outbound port 25 is considered acceptable. For business customer, not
so. In my case, I deal with the latter. It can be problematic, because
business computers do become part of part of some
On Sat, 26 Feb 2005 19:04:26 -0600, Claydon, Tom
[EMAIL PROTECTED] wrote:
We are considering filtering outbound SMTP traffic from our ISP
customers, except from our own mail servers, to help reduce the amount
of spam originating from our network. How successful/unsucessful has
implementing