Linda,
While taking a look at this issue we found that a possible cause could be the Override Filtering link itself.
By looking at the source code of your block page we noticed that for this link you have the code as:
<P><A HREF=MailScanner warning: numerical links are often malicious: http://172.31.255.1:10001/index.php?URL=%27%25u%27&Client=%25i>Override Filtering</A></P>
We’ve bolded the section that we believe could be causing your problems. vThis should instead be:
<P><A HREF=MailScanner warning: numerical links are often malicious: http://172.31.255.1:10001/index.php?URL=’%u’&Client=%i>Override Filtering</A></P>
We’ve copied your page and made this change for you, could you please test and see if this actually did fix the problem?
Sincerely,
Doretta S. Prior
Networkmaine Support Center Coordinator
Maine School and Library Network
University of Maine System
Communications and Network Services
888-FOR-MSLN