def send_mass_user_template_mail(subject_template, body_template, users, context):
message_tuples = []<EOL>for user in users:<EOL><INDENT>context['<STR_LIT:user>'] = user<EOL>subject, body = render_mail_template(subject_template, body_template, context)<EOL>message_tuples.append((subject, body, conf.get('<STR_LIT>'), [user.email]))<EOL><DEDENT>if message_tuples:<EOL><INDENT>send_mass_mail(message_tuples)<EOL><DEDENT>
Similar to `send_mass_template_mail` this function renders the given templates
into email subjects and bodies.

The emails are send one-by-one.