# Help centre

> One question, one answer. Setting up, launching a campaign, importing leads, reconnecting a mailbox, changing your plan.

Source: https://warmerly.com/docs/topics/help-centre

One question, one answer. Setting up, launching a campaign, importing leads, reconnecting a mailbox, changing your plan.

## Articles

- [All help articles](https://warmerly.com/docs/help): Answers to common Warmerly questions: using the API, launching a campaign, importing leads, reconnecting a mailbox, changing plans and more.
- [Use Warmerly with an API](https://warmerly.com/docs/help/use-the-api): Create a key under Settings > Platform API keys (Agency plan or its 7-day trial), send it as X-Api-Key, and call https://app.warmerly.com/api/v1.
- [Launch your first campaign](https://warmerly.com/docs/help/launch-first-campaign): Go to Campaigns > New campaign, name it and add leads, write your sequence, pick your mailboxes and schedule, then click Launch now.
- [Import leads from a CSV](https://warmerly.com/docs/help/import-leads-csv): Open a campaign's Audience tab, click Import leads, drop in your CSV, match the Email column (plus any others), then click Import.
- [Reconnect a mailbox](https://warmerly.com/docs/help/reconnect-mailbox): Warmerly could no longer sign in, usually after a password change or revoked access. Open the mailbox in Accounts and click Reconnect.
- [Cancel or change your plan](https://warmerly.com/docs/help/cancel-or-change-plan): Change plan in Settings > Billing with Switch to this plan. To cancel, click Cancel plan in Settings > Billing. You can pause instead. Your data is…
- [Get a free sending mailbox](https://warmerly.com/docs/help/free-sending-mailbox): Every new Warmerly account gets one free mailbox, already warming up. Use it for replies, tests and a small first campaign; connect your own for…
- [OneMail hosted mailboxes and domains](https://warmerly.com/docs/help/onemail-mailboxes): What OneMail is, how to buy a domain or bring your own, what is set up for you, how warmup and sending work, and how it is billed.