Please clarify - are those lines excerpted from a LISTSERV log, or from
the log of an SMTP service - your Subject on the message is somewhat
confusing?  (I don't even know what a "Lisert" is, actually.)

To make a few wild guesses, it looks like maybe one of your services is
stopped, or confused, or starved for resources, or perhaps a firewall is
interfering with connectivity, or maybe the physical network
(nic,hub/switch,cable) is going flaky.  If you reboot the system and try
again, does this problem recur?

At the risk of being very boring, I will repeat advice you have been
given here before - You will NOT get useful results with the IIS SMTP
service.  You need to implement some other mail handler product to
handle your LISTSERV activity.

Also, a Google search on "[10053]" brought up several items, I picked
this one out of the list:
  
http://www.altn.com/support/FAQ_Article.asp/product_id/MDaemon/Number/KBA-01510

  

>>> [log in to unmask] 4/26/2006 12:04:00 PM >>>
Can someone explain mean what is happening here?


6 Apr 2006 08:42:57 Send error: Unknown error [10053]
26 Apr 2006 09:49:56 Receive error: Unknown error [10053]
26 Apr 2006 10:06:53 -> RSET

26 Apr 2006 10:06:53 451 Timeout waiting for client input

26 Apr 2006 10:34:53 Receive error: Unknown error [10053]
26 Apr 2006 11:02:52 Receive error: Unknown error [10053]
26 Apr 2006 11:36:54 -> RSET

26 Apr 2006 11:36:54 451 Timeout waiting for client input

I'm using IIS SMTP by the way. thx