to handle inlining CSS in the above example. I also ran a one-off script using sharp
to convert SVG social media icons into PNGs.
Testing how emails look in different clients is trickier. The gold standard of email testing is Litmus
, which lets you test how your email will render on dozens of different clients. Litmus is powerful, but expensive - it starts at $99/mo, with no free tier.
My alternative approach is to instead write a Mocha test that sends a test checkout email to my Gmail and Outlook accounts. Those are the email services that my clients use, so this ensures the clients are happy, and I figure if the email looks good on 2 common clients (both mobile and desktop), it will probably look fine on most others.