I have received a response from cloudmark and they appear to have fixed
the issue.
$ telnet 208.83.139.205 2703
Trying 208.83.139.205...
Connected to 208.83.139.205.
Escape character is '^]'.
sn=D&srl=670&a=l&a=cg
a=g&pm=csl
-csl=?
c302.cloudmark.com
c303.cloudmark.com
c301.cloudmark.com
.
a=g&pm=nsl
-nsl=?
n004.cloudmark.com
n002.cloudmark.com
n001.cloudmark.com
n003.cloudmark.com
~$ telnet 208.83.137.117 2703
Trying 208.83.137.117...
Connected to 208.83.137.117.
Escape character is '^]'.
sn=D&srl=670&a=l&a=cg
a=g&pm=csl
-csl=?
c302.cloudmark.com
c303.cloudmark.com
c301.cloudmark.com
.
a=g&pm=nsl
-nsl=?
n002.cloudmark.com
n003.cloudmark.com
n004.cloudmark.com
n001.cloudmark.com
.
$ telnet 208.83.137.118 2703
Trying 208.83.137.118...
Connected to 208.83.137.118.
Escape character is '^]'.
sn=D&srl=670&a=l&a=cg
a=g&pm=csl
-csl=?
c301.cloudmark.com
c303.cloudmark.com
c302.cloudmark.com
.
a=g&pm=nsl
-nsl=?
n001.cloudmark.com
n003.cloudmark.com
n002.cloudmark.com
n004.cloudmark.com
.
