Symfony backend for contact form (advanced REST API)

Goal of this REST API is to unify handling contact forms ("Contact us" forms) from multiple websites. The API will have two endpoints: - Standard HTML POST form (x-www-form-urlencoded) input - JSON input The API will collect following data (regardless if POST or JSON input): - Person name, - Phone, - E-mail, - Message, - Website ID (just string, will be used for e-mail routing), - Contact form ID (just string, e.g. "form in footer", "contact us", etc.), - Current page on website (again just string, e.g. /contact-us, /career, etc.) The process of handling the e-mail: - Save received data to database (regardless if it's valid) - Compute SPAM scoring (probably Chain of responsibility pattern will suit the best) - check multiple factors, e.g. length of message, content of message, if phone number is correct etc. (and save that to database) - Do routing according to defined rules - each website will have it's own ruleset (Strategy pattern or maybe Symfony Service locator). E.g. for website [login to view URL], if page is career, send mail to career(at)[login to view URL] with cc to office(at)[login to view URL]; if page is Contact page, send e-mail to hello(at)[login to view URL], etc. (and save that to database) - If spam score is good, send the e-mail. If not, leave it in database so it can be manually processed. Development: - Use latest Symfony framework, - Use Doctrine for database, - Use PHPMailer for sending the e-mail, - Use Application (two application services - one for storing e-mail to database, other to sending e-mail from database)/Domain/Infrastructure layers