Is trying to fix (E)SMTP really worth it? [part 2 - infrastructure]

[digg=http://digg.com/security/Is_trying_to_fix_E_SMTP_really_worth_it_part_2]This article is the second in my series about the flaws of (E)SMTP, the whole Internet mail infrastructure and how it could possibly be fixed. The main focus of this part is a new approach to the infrastructure which should help making emailing more secure, reliable and less spam-prone.

The first article can be found here and points out flaws and problems in the current systems.