On Fri, 18 Dec 2009, Jason Bertoch wrote: > > Isn't the fundamental problem that SMTP can fall back to an implicit MX? > None of these solutions will stop spammers from skipping MX records and > using direct-to-host connections.
This has nothing to do with spam. > Shouldn't we just consider dropping the implicit MX back door as opposed > to getting creative with MX records that spammers will surely note and > avoid anyway? It's impossible to make that kind of incompatible change with an installed base of billions of users. It's already impossible to eliminate the AAAA fallback and keep the A fallback. Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ GERMAN BIGHT HUMBER: SOUTHWEST 5 TO 7. MODERATE OR ROUGH. SQUALLY SHOWERS. MODERATE OR GOOD.