Auto-Responder
Yes, you may login to http://webmail.yourdomain.com, click “Settings” -> “Auto-Responder”, tick “Enable auto-responder”, click “Auto-Responder Message” tab to enter your message and click “Save”

Forwarding
Yes, you may login to http://webmail.yourdomain.com, click “Settings” -> “Account Settings” -> “Forwarding”, enter the email address at “Forwarding Address” field, tick the “Enable deletion of messages on forward” if you do not want to receive the message after forwarded.