bug on all email of wordpress

hi, i notice the default email of wordpress and other email of other plugin are unformatted when activate Paid Memberships Pro;

example a standard password recovery email of wordpress is like this (the text are formatted):

Someone has requested a password reset for the following account:

http://mydomain.net/

Username: XXXX

If this was a mistake, just ignore this email and nothing will happen.

To reset your password, visit the following address:

<http://mydoamin.net/wp-login.php?action=rp&key=xxxxxxxxxxxxx&login=xxxx>

when activate Paid Memberships Pro, the email is like this(the text is compressed and unformatted):

Someone has requested a password reset for the following account: http://mydomain.net// Username: XXXX If this was a mistake, just ignore this email and nothing will happen. To reset your password, visit the following address: http://mydomain.net/wp-login.php?action=rp&key=xxxxxxx&login=xxxxx

i want use the template of Paid Memberships Pro for all email , for this i want use
– email_header.html
– email_footer.html

on my theme, i tried with this 2 html file and without , in both cases do not solve the problem, and the option in email setting does not allow me to send all emails with Paid Memberships Pro template.

how solve this ?

thanks