Forsvunnet on "[Plugin: Contact Form 7] Checkbox format in mail. Linebreak instead of comma separation possible?"

When using [checkbox* choice1 choice2 choice3 choice4] and checking every option, is it possible to change the format that is sent in the email?

I would like each option to be separated by line breaks instead of the default comma separation (In the email, not the form).

Ie. I want this in the email:
choice1,
choice2,
choice3,
choice4

.. But I am getting this:
choice1, choice2, choice3, choice4

http://wordpress.org/extend/plugins/contact-form-7/