I figured out a way but it might spam your zimbra with unread email... Common problem with pop on hotmail. heres the info
the incoming server is: pop3.live.com
fill up the personal information like your email and name and pass
use SSL for the incoming server.
for the outgoing server its kinda tricky.
the SMTP server is : SMTP.live.com
DO NOT USE SSL FOR THE SMTP SERVER.
Here's the tricky part. The SMTP server uses another port. The port is 587.
You have to check username and password required to send mail and then enter your email and pass. This should work

Let me know if it works