Mailx stopped working

after a new patch set on the 14th. I noticed that mailx stopped working, as far a I can tell that is the only thing that changed.

solaris 10 OS
it seems everything is the same, sendmail seems to be running

root@server # ps -ef | grep -i sendmail
   smmsp   687     1   0 10:42:25 ?           0:00 /usr/lib/sendmail -Ac -q15m
    root   686     1   0 10:42:25 ?           0:02 /usr/lib/sendmail -bl -q15m
    root  9824  5486   0 07:57:36 pts/2       0:00 grep -i sendmail

but I only see this in the logs

Deferred: Connection refused

50 <me@blah.com>... Connecting to blah.com via esmtp...
050 <me@blah.com>... Connecting to mailhost.enterprise.blah.com via esmtp...
050 <me@blah.com>... Deferred: Connection refused by mailhost.enterprise.blah.com
250 2.0.0 w0OCkXWb005569 Message accepted for delivery
me@blah.com... Sent (w0OCkXWb005569 Message accepted for delivery)

I have checked and tested, and am at a loss, can anyone help with what else I can check? and how to get it running again?

more issues,

mail

returns, cannot open mailfile

and

mail -f users 

returns the same