Glossary
Autoresponder
An automatic reply or fixed series of messages sent in response to an event such as a signup or an incoming email.
ValidReach Team · Updated 2026-10-26
In practice
An out-of-office reply is one kind. A signup series is another.
An autoresponder reply shows a mailbox exists, but the useful signal for list hygiene is a bounce, not a reply.
Verification and sending
Do not treat automatic replies as proof of an engaged contact. Verify the list instead.