You don’t write your email in your IDE

Found the emacs user.

A senior dev writes a program to generate her email.

I have actually done this, and for more than just automated responses. It was before ChatGPT, though; now, I'd be surprised if even junior devs aren't doing it.

CI / CD baby, every autosave my build pipeline clones my email, transpiles it into more easily understood archaic English and then sends a copy to the intended recipient while kicking off a chron job to send an automated follow up email to them and everyone they're contacts with 2 hours from commit time.