weird message when downloading mail

Giganews Newsgroups
Subject: weird message when downloading mail
Posted by:  Mark Di Nicola (don…
Date: Mon, 07 Jun 2004

i've been having problems downloading mail where it would seemingly stop
downloading mail so i enabled a logfile and for 18 minutes every 20 or
so seconds i get

Recv 7/06/04 3:14:07 PM: X-ISafe-KeepAlive:0<EOL>

from the server. after 20 minutes it starts downloading the message at
full speed. googled for it but i couldn't find a match. anyone have any
idea what that is?