Routes appear magically

[lazear at gateway.mitre.org]

Can someone suggest why our Sun server magically accumulates
routes for nets around the country (pointing to our local gateway)
when all we have in our /etc/rc files is a default gateway route
command?  We are NOT running "routed".  We ARE running a newer
version of "sendmail".  The routes being added have "use" counts
and an "H" flag (undocumented).  The routes are correct, but their
source and necessity are in question.  Thanks for any help.

	Walt Lazear
	MITRE Corp.