Scot L. Harris writes:
On Fri, 2004-08-27 at 20:03, Sam Varshavchik wrote:Scot L. Harris writes:
> On Fri, 2004-08-27 at 19:39, Sam Varshavchik wrote:
>> Bob Chiodini writes:
>> >> > I am a Bellsouth customer and for almost a year had a SMTP server up on
>> > my DSL link, but no more. They began blocking port 25 traffic TO their
>> > subscribers in an effort to stop SPAM. I personally do not see how
>> > blocking port 25 traffic to my IP address stops SPAM.
>> >> Very easy: their network is infested with clueless imbeciles running open >> relays, or open proxies, on port 25.
> > Blocking outbound port 25 makes more sense for that.
Not if the clueless imbecile's mail server is configured to smarthost mail through the ISP.
Ah! But then the ISP knows which users are spamming everyone else since they can easily tell that by the load put on their email servers.
But not before the ISP's customer smarthosts get blacklisted.
Which is why they block inbound port 25 in the first place.
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