[imp] Redirect upon logoff

[Sun Advocate Webmaster]

Is it possible to have horde redirect users upon logoff?

There is a "start page" with my webmail setup, where users get 
instruction about the webmail system and are allowed to choose a webmail 
interface (Horde and SquirrelMail). When they logoff, I want them 
returned to the webmail start page, where they began.

Is this possible?

I did modify horde/login.php and added my own redirect (using php's 
header command), but it then causes other problems (wierd errors about 
login failure about half the time users log in). I ended up taking this 
out. Horde works great, but doesn't do the redirect like I wanted.

Any advice?