Re: lots of lost connections
- On Mar 30, 2010, at 3:05 PM, brian moore wrote:
> On Tue, 30 Mar 2010 14:13:27 -0700Thank you for the explanation. It's what I imagined to be the case, poorly written spam clients (well, poorly written from a good-is-correct pov, but spammers would likely disagree with that definition.)
> Terry Barnum <terry@...> 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.)