# Glossary of Warmerly terms

> Plain-English definitions of the words used in the Warmerly app: mailbox, OneMail, free (sandbox) mailbox, warmup, ramp, health score and placement test.

Source: https://warmerly.com/docs/help/glossary

What the words in the Warmerly app mean. For general email terms (SPF, DKIM, DMARC, sender reputation) there is also the [deliverability glossary](https://warmerly.com/glossary) on warmerly.com. Plan prices and allowance numbers are never listed here: see [Plans & limits](https://warmerly.com/docs/plans-and-limits).

## Mailboxes and warmup

### Mailbox

An email address Warmerly sends from and reads replies from. You either connect one you already have (Gmail or Google Workspace with an app password, Microsoft 365 or Outlook with one-click sign-in, or any provider over IMAP and SMTP), or Warmerly hosts one for you (OneMail). Mailboxes live under **Accounts**. See [Connecting a mailbox](https://warmerly.com/docs/guides/mailbox-connection).

### Account

On the **Accounts** page, an "account" is any sending identity: a mailbox or a LinkedIn account. (In the API docs and some code paths a mailbox is called an "email account".)

### OneMail

Mailboxes and domains that Warmerly hosts for you, with the DNS and warmup handled. You can buy a new domain, bring one you own, or add mailboxes to a domain you have. A OneMail mailbox is billed per mailbox and never uses your plan's mailbox limit. See [OneMail](https://warmerly.com/docs/help/onemail-mailboxes).

### 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).

### Ready-warmed mailbox

A OneMail mailbox that is already warm when you buy it, when available. See [OneMail](https://warmerly.com/docs/help/onemail-mailboxes).

### Warmup

Background activity that builds a mailbox's sending reputation: your mailbox exchanges ordinary messages with other mailboxes in Warmerly's warmup network, and both sides open and reply. Warmup **never emails your prospects**. See [How warmup works](https://warmerly.com/docs/how-warmup-works).

### Ramp

Starting small and increasing volume over time. There are two:

- **The warmup ramp:** a mailbox's daily warmup volume rises gradually toward its limit. When you connect a mailbox you can choose how quickly (Safe, Balanced or Faster in the Android setup).
- **The campaign volume ramp:** a campaign whose mailboxes have had under 14 days of warmup starts with a small number of emails per mailbox per day and climbs, which makes launching on day one safe. You can turn it off in the campaign's **Settings** tab.

### Daily limit

The most emails a mailbox will send per day. It is shared across every campaign that mailbox sends for. See [Troubleshooting](https://warmerly.com/docs/troubleshooting#a-campaign-is-not-sending).

### Health score

A number from 0 to 100 for how likely a mailbox's email is to reach the inbox instead of spam. Statuses you will see next to it: **Healthy** (sending well), **Warming** (still building trust), **At Risk** (warning signs, may need action) and **Paused** (not sending right now). See [Dashboard overview](https://warmerly.com/docs/help/dashboard-overview).

### Paused, and "campaign sending paused"

These are different. A **paused** mailbox is stopped for both warmup and campaigns and needs attention (for example it needs reconnecting). A mailbox whose **campaign sending is paused** because of reputation is out of campaigns only: warmup keeps running and campaign sending returns automatically once it is healthy again; if the whole workspace was restricted, our team may also take a look. See [Why did my sending slow down or pause?](https://warmerly.com/docs/help/sending-slowed-or-paused) and [Troubleshooting](https://warmerly.com/docs/troubleshooting#a-mailbox-is-paused-or-shows-as-unreachable).

### Placement test

A test that sends real probe emails from a mailbox to a small set of target mailboxes and reports whether each landed in the inbox, promotions or spam. Run it from **Accounts**, open the mailbox, then the **Health** tab and **Run new test**. Each test uses one of your monthly placement tests.

### Tracking domain

Your own web address used for open and click tracking links in campaign emails, instead of Warmerly's. See [Custom tracking domain](https://warmerly.com/docs/guides/custom-tracking-domain).

## Campaigns and leads

### Campaign

A sequence of emails sent to a list of leads from the mailboxes you choose, on a schedule. Built under **Campaigns > New campaign**: **Audience**, **Sequence**, **Launch**. See [How do I launch my first campaign?](https://warmerly.com/docs/help/launch-first-campaign).

### Lead

A person you might email, with their address and company details. Leads belong to a campaign. Find them with **Lead finder**, import a CSV, or add them by API.

### Sequence and merge tag

The **sequence** is the series of emails a campaign sends. A **merge tag** (also called a variable), such as `{{firstName}}`, is filled in from each lead's data when the email is sent.

### Sender

A mailbox chosen to send a campaign. Emails are spread across the senders you pick.

### Suppression list (shown as "Do not contact")

Addresses Warmerly must never email from your workspace: hard bounces, spam complaints, unsubscribes and ones you add. Add addresses in your workspace's **Do not contact** box under **Settings > Workspaces**. Campaigns and replies skip these addresses automatically. See [Suppression API](https://warmerly.com/docs/suppression).

### Verification, and Email finder

**Email verifier** (sidebar **Prospecting > Email verifier**) checks whether an address is likely deliverable before you send. **Email finder** looks up an address for a person or company. Both use monthly allowances.

### Data library

The **Data library** (sidebar **Prospecting > Data library**) is where your saved lists, imports and exports are found in one place: bulk jobs from Email finder and Email verifier, LinkedIn imports and your campaign audiences.

### Warmerly Link

The name of the LinkedIn side of Warmerly (the **LinkedIn search** tab of **Prospecting > Lead finder**): LinkedIn warmup and outreach. It is sold per connected LinkedIn account. See [Plans & limits](https://warmerly.com/docs/plans-and-limits).

### Inbox

**Inbox** in the sidebar collects replies from every mailbox in one place. Replies are auto-categorised as lead, not relevant or spam.

## Workspaces, plans and limits

### Workspace

The top-level container for your account: it owns the plan, the billing, the team members and everything inside it. You can belong to several. Managed under **Settings > Workspaces**, where each workspace's page also holds its team. On the Agency plan, client workspaces share the Agency workspace's allowances. See [Workspaces](https://warmerly.com/docs/workspaces).

### Project

A subdivision inside a workspace for a client or brand, with its own mailboxes, campaigns and inbox. If you only run one brand you can ignore projects. See [Workspaces](https://warmerly.com/docs/workspaces#projects).

### Slot

A unit you buy on top of your plan for one extra account: a **Warmerly Link slot** for each connected LinkedIn account. A "mailbox slot" is informal for one of the mailboxes your plan lets you connect.

### Monthly allowance

A monthly meter that resets on the 1st and does not roll over: verifications, email lookups, LinkedIn lookups, lead exports, placement tests, AI credits and Free's campaign sends.

### Capacity limit

A live count with no reset, such as mailboxes, active campaigns and active prospects. Disconnect a mailbox and the slot is free at once.

### Credit

The currency for AI actions and for top-ups. Your plan includes a monthly amount of AI credits. You can also buy credit packs, which never expire and are spent after the monthly amount. Credits can buy a block of extra verifications, lookups, lead exports or placement tests when you run out mid-month, and nothing is ever bought automatically. See **Settings > Usage & limits**.

### Grace period and billing lock

If a workspace ends up over its plan, a countdown banner gives it a grace period, during which everything keeps working. A **billing lock** is the screen that blocks the dashboard when there is no plan, a payment is overdue, or the grace period has ended. Warmup and campaign sending pause while it lasts, and nothing is deleted. See [Plans & limits](https://warmerly.com/docs/plans-and-limits#billing-lock).

## Assistants and developers

### Warmi

Warmerly's AI support assistant, in the chat button on every page. See [Warmi](https://warmerly.com/docs/help/warmi-support-assistant).

### Connected app, and MCP

An AI assistant (Claude, ChatGPT, Cursor and others) you have allowed into one workspace through the Model Context Protocol (MCP). Managed under **Settings > Connected apps**. See [Use Warmerly with AI](https://warmerly.com/docs/ai) and [connected apps](https://warmerly.com/docs/help/manage-connected-ai-apps).

### Platform API key

A **Platform API key** (**Settings > Platform API keys**) is for the Warmerly API and needs the Agency plan. See [Authentication](https://warmerly.com/docs/authentication).

### Webhook

A web address of yours that Warmerly calls when something happens, such as a mailbox health event. Set up under **Settings > Webhooks**. See [Webhooks](https://warmerly.com/docs/webhooks).

### Audit log

A record of recent activity by your team and by connected apps, under **Settings > Audit log**.

## Related

- [Getting started checklist](https://warmerly.com/docs/help/getting-started-checklist)
- [Frequently asked questions](https://warmerly.com/docs/faq)

## Every term has its own page (32)

- [Mailbox](https://warmerly.com/docs/help/glossary/mailbox)
- [Account](https://warmerly.com/docs/help/glossary/account)
- [OneMail](https://warmerly.com/docs/help/glossary/onemail)
- [Free mailbox (also called the sandbox mailbox)](https://warmerly.com/docs/help/glossary/free-mailbox-also-called-the-sandbox-mailbox)
- [Ready-warmed mailbox](https://warmerly.com/docs/help/glossary/ready-warmed-mailbox)
- [Warmup](https://warmerly.com/docs/help/glossary/warmup)
- [Ramp](https://warmerly.com/docs/help/glossary/ramp)
- [Daily limit](https://warmerly.com/docs/help/glossary/daily-limit)
- [Health score](https://warmerly.com/docs/help/glossary/health-score)
- [Paused, and "campaign sending paused"](https://warmerly.com/docs/help/glossary/paused-and-campaign-sending-paused)
- [Placement test](https://warmerly.com/docs/help/glossary/placement-test)
- [Tracking domain](https://warmerly.com/docs/help/glossary/tracking-domain)
- [Campaign](https://warmerly.com/docs/help/glossary/campaign)
- [Lead](https://warmerly.com/docs/help/glossary/lead)
- [Sequence and merge tag](https://warmerly.com/docs/help/glossary/sequence-and-merge-tag)
- [Sender](https://warmerly.com/docs/help/glossary/sender)
- [Suppression list (shown as "Do not contact")](https://warmerly.com/docs/help/glossary/suppression-list-shown-as-do-not-contact)
- [Verification, and Email finder](https://warmerly.com/docs/help/glossary/verification-and-email-finder)
- [Data library](https://warmerly.com/docs/help/glossary/data-library)
- [Warmerly Link](https://warmerly.com/docs/help/glossary/warmerly-link)
- [Inbox](https://warmerly.com/docs/help/glossary/inbox)
- [Workspace](https://warmerly.com/docs/help/glossary/workspace)
- [Project](https://warmerly.com/docs/help/glossary/project)
- [Slot](https://warmerly.com/docs/help/glossary/slot)
- [Monthly allowance](https://warmerly.com/docs/help/glossary/monthly-allowance)
- [Capacity limit](https://warmerly.com/docs/help/glossary/capacity-limit)
- [Credit](https://warmerly.com/docs/help/glossary/credit)
- [Grace period and billing lock](https://warmerly.com/docs/help/glossary/grace-period-and-billing-lock)
- [Warmi](https://warmerly.com/docs/help/glossary/warmi)
- [Connected app, and MCP](https://warmerly.com/docs/help/glossary/connected-app-and-mcp)
- [Webhook](https://warmerly.com/docs/help/glossary/webhook)
- [Audit log](https://warmerly.com/docs/help/glossary/audit-log)

## More in Get started

- [Authentication](https://warmerly.com/docs/authentication): How to authenticate requests to the Warmerly API using an X-Api-Key header, where to generate and revoke a…
- [Getting started with Warmerly: from signup to your first send](https://warmerly.com/docs/help/getting-started-checklist): A checklist for the whole Warmerly journey: create your account, use the free mailbox, connect your own…