Most of these static customers are legitimate business networks
running their own mail server, and have neither the need nor desire
to relay their mail through Comcast's SMTP servers. I think your
general idea is very good, but you're reaching a little too far with
this one.
...omissis...
I've considered the exact opposite (adding static to the check for
keywords). My rules are really looking more for is this a _client_
host, not is this a dynamic host. That one check looks for
dynamic, but I'm not interested in exempting anyone because they're
static.
