On Tue, 30 Mar 2010 14:13:27 -0700 Terry Barnum <te...@dop.com> wrote:
> Other ideas why those clients didn't get rejected before DATA? ESMTP Pipelining? They could very well be rejected before DATA, except, well, with pipelining they may have already started sending the message. (There are quite a few spam clients that use pipelining for the same reason it was added.. it does speed up sending. Of course, spam clients also tend to have horrible error detection and just close the socket when they get an error, and sometimes just close it after sending the end-of-data marker without even bothering to see the response... not like they care if the address is valid or not.)
