So I got #mailgun working with #cloudflare workers in the console, no problem. Try it from the browser and I get a weird "no from specified" error. WTF. I tried the official partner, #mailchannels, and yeah, it just worked perfectly from the start. I think I should have taken the hint when I found SendGrid and Mailgun's NPM's don't work in Cloudflare workers and were out of date (everyone else seems to be doing raw API requests like I tried).

So I got #mailgun working with #cloudflare workers in the console, no problem. Try it from the browser and I get a weird "no from specified" error. WTF. I tried the official partner, #mailchannels, and yeah, it just worked perfectly from the start. I think I should have taken the hint when I found SendGrid and Mailgun's NPM's don't work in Cloudflare workers and were out of date (everyone else seems to be doing raw API requests like I tried).