In message
<!&!AAAAAAAAAAAYAAAAAAAAAIfCFjaFV0BEsFq4L0YKekfCgAAAEAAAAEqrpksOt4dIlSNQv
[log in to unmask]>, at 13:37:31 on Wed, 14 Mar
2007, Tim Trent <[log in to unmask]> writes
>What surprised me was the idea from Trend Micro about blocking port 25
>which will allegedly cut spam at a stroke.
The idea is that the ISP can then do rate-monitoring of the emails
*sent* by their subscribers, and decide that "large" mailings must be
spam. There is also the possibility to check that the domain name from
which the email purports to come is one that's "registered" to the
subscriber - so sending a genuine mailing "on behalf of" a client may
become more difficult.
A drawback is that most of the spam people *receive* isn't sent from the
UK, and in many ways this is just another stage in an arms race
(spammers have shown in the past that they always adapt, whatever
obstacles are put in their way). This is not about clueless UK marketers
abusing the DPA.
--
Roland Perry
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