[benmxrt]

That is an intriguing feature request. Most disposable services avoid outgoing mail entirely to prevent being abused for spam, but a strict 'Reply-Only' policy (where you can only send to the address that just emailed you) is a clever middle ground.

Implementing this while maintaining the zero-persistence architecture would require a secure, ephemeral SMTP relay. It’s definitely a complex challenge, but the value it adds for verifying accounts that require a response is huge. I’m adding this to the experimental roadmap!