disabling SMTP

["Eric A. Hall" <ehall () ehsco com>]

I'm wondering if the installed base of legitimate messaging systems has
migrated to ESMTP so as to get away with disabling plain-old SMTP except
for internal devices.

Anybody got any data or observations on this?

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/