On 16 Oct 2013 09:15:07 -0700 "Neil Schwartzman" <n...@cauce.org> wrote:
> List verification. Many receiving sites will block after X bounces, > clean up your list from 550s, and spam the real thing from another > botted IP. <rant> And you know who we can thank [sic] for this mechanism of list verification? Microsoft, that's who. For versions of Microsoft Exchange prior to 2013, you need to jump through ridiculous hoops to configure it so that invalid RCPT commands are rejected. By default, Exchange accepts any old RCPT command and then either rejects after DATA or (if a RCPT was valid) is forced to generate a delivery failure notification. For Exchange 2013, the ridiculous hoops no longer work and I don't believe it is even possible to configure Exchange 2013 to reject invalid RCPTs without truly grotesque hacks. Thank you, Microsoft, for making the Internet a better place. </rant> Regards, David.
