# Free mailbox (also called the sandbox mailbox)

> The mailbox every new account gets at signup, already warming up.

Source: https://warmerly.com/docs/help/glossary/free-mailbox-also-called-the-sandbox-mailbox

The mailbox every new account gets at signup, already warming up. It shows a **Free gift** badge on **Accounts**, uses no plan slot, and needs no DNS. It warms up and can be used for replies and tests, and, when a place is free on the shared domain, a small first campaign after 14 days of warmup (up to 3 emails a day). Inside Warmerly and in some answers you may see it called the "sandbox" or "free trial" mailbox. See [How do I get a free sending mailbox?](https://warmerly.com/docs/help/free-sending-mailbox).

## Where the docs use it

- [How do I get a free sending mailbox?](https://warmerly.com/docs/help/free-sending-mailbox)
- [Getting started with Warmerly: from signup to your first send](https://warmerly.com/docs/help/getting-started-checklist)
- [Can I launch a campaign before my mailbox has finished warming up?](https://warmerly.com/docs/help/launch-before-warmup-finishes)
- [How our email infrastructure works](https://warmerly.com/docs/infrastructure)

## More from Glossary of Warmerly terms

- [OneMail](https://warmerly.com/docs/help/glossary/onemail): Mailboxes and domains that Warmerly hosts for you, with the DNS and warmup handled.
- [Ready-warmed mailbox](https://warmerly.com/docs/help/glossary/ready-warmed-mailbox): A OneMail mailbox that is already warm when you buy it, when available.
- [Warmup](https://warmerly.com/docs/help/glossary/warmup): Background activity that builds a mailbox's sending reputation: your mailbox exchanges ordinary messages…