Suddenly I can no longer send emails using my hotmail account with Kerio running. Kario even prevented me from registering at this site (My Hotmail account was considered invalid). When trying to send out an email, I get this error:

"Your Windows Live Hotmail account information doesn't match this browser session. This can happen, for example, if you log into different Windows Live Hotmail accounts on the same computer. Please refresh your browser and try again."

When I exit out of Kerio, I am able to send email using my Hotmail account and I was able to register to Castlecops forums.

Just wondering why this has started so suddenly and it there is something in configuration I can do.

Sounds like you have a cookie problem.

Delete your browser cache and cookies. Reboot.

Make sure that cookies are enabled/not blocked.