[Django]-Django Rest framework Field is Required error

DRF needs the Content-Type header to find the correct parser for your data.

Try to add -H "Content-Type:application/json" to your curl-call.

Also note single-quotes (')as you use them aren’t valid JSON. JSON only allows double-quotes (").

So your correct curl-call would be

curl -X POST http://127.0.0.1:8000/email/new/ -H "Content-Type: application/json" -d '{"sender": "a@b", "receiver":"c@d", "message":"yolo"}'