[anti-abuse-wg] The well-behaved ISP's role in spamfight

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In message <201702131743.10508.peter at hk.ipsec.se>, peter h
<peter at hk.ipsec.se> writes

>The very simplest thing to do is make sure any outbound smtp is relaye through 
>the ISP's 
>mailrelays, where spam could be detected and subsequently blocked.

this is very unpopular with legitimate businesses who wish to be fully
in control of their email sending destiny -- and ISPs generally do not
wish to discourage the people who cause no trouble and pay their bills
regularly and on time

so although "port 25 blocking" is a M3AAWG Best Practice it has not been
widely adopted with the main (but not only) exception being the large
consumer ISPs in the US (ISPs in Europe have, for historical reasons,
had a significant number of business customers mixed in with pure
consumers and that has made the difference)

- -- 
richard                                                   Richard Clayton

Those who would give up essential Liberty, to purchase a little temporary 
Safety, deserve neither Liberty nor Safety. Benjamin Franklin 11 Nov 1755

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