Remove wpautop from retrieve_password_message

Thanks to the constructive conversation with Jacob in the comments, I did some additional tests and realized that the <p> tags were in fact added by the plugin - testing in ive environment revealed that the email was plain text.

The solution to the problem was to add the following snippet in my functions.php:

function email_set_content_type(){
  return "text/html";
}
add_filter( 'wp_mail_content_type','email_set_content_type' );