Glossary · Mailboxes
An email alias is an extra address that delivers into an existing mailbox, such as hello@ or billing@ arriving in your own inbox.
An alias has no password or storage of its own. Mail to it lands in a real mailbox, and with send-as you can reply from the alias too. Aliases are the tidy way to publish role addresses without paying for another seat.
Compare a shared mailbox, which several people sign in to, and a catch-all, which accepts every address at the domain. In SuperMailOS, aliases are free and unlimited on every plan and domain.
Every domain you run in one inbox, from $3 a mailbox. 14 days free, no card.