Reply-To

Notifications are sent from our domain, so hitting reply would write to us rather than to your visitor. To avoid that, every notification carries a Reply-To header pointing at the sender.

Picked automatically

We look through the submission for something that resembles the sender’s address — a field named email, e-mail, your-email, and a few others, then any field whose name contains “email” and whose value parses as an address. In practice a form with an email field needs nothing else.

Setting it yourself

<input type="hidden" name="replyto" value="sales@example.com">

An explicit replyto always wins. Use it when the address to reply to is not the address in the form — routing everything to a shared mailbox, say.