webmail error - forbidden

About a week ago, I started receiving complaints from our clients stating that they could not access webmail. None of our accounts can access by going www.example.com/webmail. We can access if we use the root server name
https://server.name.com:2443/webmail/.

Has anyone experienced this problem? Please help!

My iworx.conf file has not been changed by me, here it is if it helps:

InterWorx Apache Supplement

legacy suexec loading

<IfModule !mod_suexec.c>
LoadModule suexec_module /usr/lib/httpd/modules/mod_suexec.so
</IfModule>

Enable CGIs

AddHandler cgi-script .cgi
AddHandler cgi-script .pl

setup the basic redirects

RewriteEngine on
RewriteRule ^/siteworx(/)?$ https://%{HTTP_HOST}:2443/siteworx/?domain=%{HTTP_HOST} [R,L]
RewriteRule ^/nodeworx(/)?$ https://%{HTTP_HOST}:2443/nodeworx/ [R,L]
RewriteRule ^/webmail(/)?$ https://%{HTTP_HOST}:2443/webmail [R,L]

proxy access to avoid non-standard ports

ProxyRequests Off

ProxyPass /webmail http://127.0.0.1:2080/webmail
ProxyPassReverse /webmail http://127.0.0.1:2080/webmail

ProxyPass /horde http://127.0.0.1:2080/horde
ProxyPassReverse /horde http://127.0.0.1:2080/horde

ProxyPass /squirrelmail http://127.0.0.1:2080/squirrelmail
ProxyPassReverse /squirrelmail http://127.0.0.1:2080/squirrelmail