[Plugin: Contact Form 7] Checkboxes appear unreadable in mail

Regards.

Everything in Contact Form 7 works fine… except looking at the checkboxes. They render properly on screen, but when I receive it’s values in a mail, they appear in the same line, without breaks. It’s quite difficult to read.

It’s something like:

My checkboxes:
Value 1 Value 2 Value 5 Value 8 Value 15

This is correct, but unreadable. How could i add a linebreak after every value? Please notice I’m talking about the mail, NOT the website. They render fine in the website.

Thanks in advance.