Sendgrid

Sendgrid is great but takes some fiddling.

Configuration

I am using a Dynamic Template from here.

I am building it from HTML snippets in Reusable, here:

development/Reusable/HTML_CSS/basicEmailHtml_header.html

Go here to set up DNS records to authenticate your domain.

You will have to add something like 5 CNAME and 1 TXT DNS records, all kinda ugly. Just do it!

Make sure you don't proxy them if you are using Cloudflare.

Repeat if you change registrars!