Use emoticon in subject line for sendgrid email

Question

How can I use an emoticon in a subject line in an email?

I would like to use the rocket. I tried adding the HTML decimal entity in the subject string. However this is rendering as the characters and not the rocket.

"Launch 🚀"

Answer 1

Subject lines don't get rendered as HTML in email clients. What you want to do is send the literal character, ie: Launch 🚀.

Answer 2

We use sendgrid via java and the following string text to provide this html code effectively in the subject line, \uD83D\uDE80, so for example, [dlh.io] Initial Data Sync Complete \uD83D\uDE80, works like a charm.