I currently have a site where the data is hosted on Firebase and the static files are hosted on AWS (I registered my domain using NameCheap, but am routing to AWS using Route 53 and S3). I now want to use SendGrid to send emails, but they are saying that I need to set up an SMTP server. I can't find anywhere what the best way to do this is. Can I get suggestions please on the best solution? I want to use SendGrid to send transactional email such as "Welcome to the site!", "Forgot Password", etc.