How to customize IdentityUserPortlet lost password email in JBoss EPP 4.3?

Issue

I'm trying out the Lost Password feature on the IdentityUserPortlet.

I would like to know how to change the default emailfrom as well as the email message. By default, the emailfrom is do-not-reply@jboss.com and the default email body is:

Hello,

we have received your request to reset your password on jboss.org.

The user information are written here for your convenience:
Username: your-user-name
Password: your-password

It is highly recommended that you change the generated password after your next login.

Best regards,
jboss.org