UX suggestion.

When I sent my first email using 0.email, I didn’t realize that you have to press Enter after typing the recipient's email for the send button to become active. It wasn’t immediately obvious, and I got a bit stuck wondering why I couldn’t send the email.

Suggestion: maybe show a small tip like “press ⏎ to set” inside the input field — something like the second screenshot I’ve attached.

Could also be a user setting, like "show helpful tips", for people who are new to the flow.

Not a big deal at all, just a tiny thing I think could make the experience a bit smoother for first-time users.

Thanks for the awesome tool!