{% if subject %}{{ subject }}{% endif %} {% if preheader %}{{ preheader }}{% endif %} {% for font in font_urls %}{% endfor %} {% if theme_attributes or mj_classes %}{% for tag, attrs in theme_attributes %}<{{ tag }}{% for key, value in attrs.items %} {{ key }}="{{ value }}"{% endfor %} />{% endfor %}{% for name, attrs in mj_classes %}{% endfor %}{% endif %} {% if mjml_styles %}{% for css_class, rule in mjml_styles.items %}.{{ css_class }} { {{ rule }} }{% endfor %}{% endif %}