>>
>> Indeed. But only fools react to open relays by
>> blacklisting an entire ISP domain, as (I think) ORBS has done.
>>
But what IF a major service provider was to decide to "reduce spam" by
prefenting ALL of their residential customers from accessing and SMTP server
but their own [the cable company's].....
This has actually happended here in NY. You MUST use their SMTP server!!!!
[they have blocked ALL outbound traffic on port 25 except to their IP!]