changing from: email in Discourse + Mandrill

Hello,

I have a Discourse setup (using mandrill for email) at mydomain.com. However all links and email still show the bitnami server. for example the password change email says:

Somebody asked to reset your password on 
[My Website](http://new-server-XXXXXX.bitnamiapp.com).

If it was not you, you can safely ignore this email.

Click the following link to choose a new password:
http://new-server-XXXXXX.bitnamiapp.com/users/password-reset/XXXXXXX....XXXXX

In addition all links have the bitnami domain. for example:

http://new-server-XXXXXX.bitnamiapp.com/faq

I would like to change it so that links appear as http://mywebsite.com/faq

Where can I change this settings?

Thank you