[horde] Timeout Problems

[Laura McCord]

Our campus is having to excessively relogin when composing messages. 
The message that appears is the following:
 "Please log in again to resume composing your message. If you are NOT using
cookies AND you are composing messages in popup windows, you will have to
log in again in your main window as well. This is to keep attackers from
hijacking your session ID. We apologize for any inconvenience."

This message appears practically everytime a user selects 'send message'
when replying to or composing an email.

Is there a way to reduce the amount of times this occurs? We are really
getting a negative response from our campus users.

Thanks,
 Laura