The braces used by styles and JavaScript (i.e. { and }), conflict with the H2o parser for tag replacement in email templates. The parser expects variables to be between the braces, e.g., {service.name}, but since you have CSS styles defined, you have { padding-top: 0 !important; ... }, which is invalid H2o tag syntax.   You can either use inline-styles instead, or you can update your config file in /config/blesta.php to change the characters used by the H2o parser to something else, like two b