We put our blocks in place some time ago, Mainly on the Cable Modem side. We
found
our userbase was very prone to becoming zombie agents for spam. We did
enhance our static i.p product by allowing statics to have port 25 open, this
averted any real business class customers to continue to
PROTECTED]
Subject: Re: SMTP Port Blocking: Success or Failure?
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
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
On Sat, 26 Feb 2005, Claydon, Tom 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 outbound SMTP filtering done in
