>> > There is a technical reason behind why some ports are blocked. It only
>> > happens when you have a dynamic IP configuration. They can't unblock ports
>> > on their dynamic pools.
>>
>> I really have a hard time imagining a good technical reason for it.
> Because the assignment of IP numbers to spammers also keeps changing,
> effectively every IP address in the dynamic range becomes a range where
> spam originates, so it's likely to get blacklisted.
> And because the mapping between domain names and IP numbers keeps
> changing, your SMTP agent on your computer would likely find its IP
> number blacklisted often enough to be annoying.
That's a reason why you may not be able as a DSL user to make good use
of port 25 for outgoing email. That's not a good reason (and especially
not a technical one) for your provider to bloc this port, and even less
other ports, and even less for incoming traffic.
Stefan
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