On Wed, 2004-09-15 at 04:16, Meng Weng Wong wrote:
oh, i just figured out one more class of solutions:
spammers will start to forge www.example.com
receivers will observe that www.example.com has no mx record
receivers will try to connect to port 25
receivers will observe that www.example.com is not an mta
this knowledge can be recorded in some sort of rfc-ignorant
type system or reputation ssytem or whatever.
This sort of thing is already a way to get domains listed in the
postmaster, abuse and DSN zones at rfc-ignorant.org, provided that the
condition persists for a reasonable time (e.g. 5 days). Listing a domain
because of a single connection failure would clearly be daft.
Paul.
--
Paul Howarth <paul(_at_)city-fan(_dot_)org>