Yep, if you're using the SMTP API, see https://sendgrid.com/docs/API_Reference/SMTP_API/substitution_tags.html https://sendgrid.com/docs/API_Reference/SMTP_API/

Yep, if you're using the SMTP API, see https://sendgrid.com/docs/API_Reference/SMTP_API/substitution_tags.html https://sendgrid.com/docs/API_Reference/SMTP_API/substitutio.... If you're using a wrapper like sendgrid-ruby (https://github.com/sendgrid/sendgrid-ruby https://github.com/sendgrid/sendgrid-ruby), check out its documentation page on GitHub. For instance, here's how to use substitution tags in Ruby: https://github.com/sendgrid/sendgrid-ruby#working-with-templates https://github.com/sendgrid/sendgrid-ruby#working-with-templ...