Remember to change domain.com to one of your actual domains. Then test it out. Note that a DA update will write over the index.html, so make a copy to index2.html.
Good idea, but it's not tokenized. It just a flat out file send.
If you want to start getting fancy, then you can just create your own password change form in your own webpages.. or even built right into webmail, then in your form you can specify whatever you want dynamically for the "redirect" value. Just post it to the same place as is in the current form 2222/CMD_CHANGE_EMAIL_PASSWORD) http://www.directadmin.com/features.php?id=229