# Knowledge Base

> A collection of answers to frequently asked questions and step-by-step guides for getting the most out of MailBlastr.

Welcome to the MailBlastr Knowledge Base — a collection of answers to frequently asked questions and task-oriented guides. Where the [API reference](https://www.mailblastr.com/docs/api/emails-send) tells you exactly what each endpoint accepts and returns, the Knowledge Base walks you through **how to get something done**: receiving and forwarding mail, authoring templates, wiring MailBlastr into your stack, and handling your account.

## Sending & testing

Pick the right feature, send test mail safely, and automate your integration.

- [Which sending feature should I use?](https://www.mailblastr.com/docs/kb/which-sending-feature) — transactional sends vs. campaigns.
- [What addresses can I use for testing?](https://www.mailblastr.com/docs/kb/test-addresses) — the mailbox simulator.
- [How do I set up automated (E2E) testing?](https://www.mailblastr.com/docs/kb/e2e-testing) — assert on responses and events.

## Receiving & forwarding

- [Can I receive emails with MailBlastr?](https://www.mailblastr.com/docs/kb/receive-emails) — inbound via webhooks.
- [Forward emails with MailBlastr Inbound](https://www.mailblastr.com/docs/kb/forward-inbound) — a Next.js walkthrough.

## Templates & editors

- [Template emails with React Email](https://www.mailblastr.com/docs/kb/react-email-templates) — author templates as components.
- [Embed the React Email editor](https://www.mailblastr.com/docs/kb/embed-react-email-editor) — a visual editor in your own app.

## Integrations

- [Get started with MailBlastr and Supabase](https://www.mailblastr.com/docs/kb/supabase-getting-started) — auth emails and Edge Functions.
- [Setting up MailBlastr for multi-tenant apps](https://www.mailblastr.com/docs/kb/multi-tenant) — single account vs. BYOK.
- [Send emails with n8n and MailBlastr](https://www.mailblastr.com/docs/kb/n8n) — no-code workflow automation.

## Account & security

- [Where can I find documents like DPA or W-9?](https://www.mailblastr.com/docs/kb/downloading-documents) — compliance and tax docs.
- [How can I delete my team?](https://www.mailblastr.com/docs/kb/delete-team) — remove a team and its data.
- [How to handle API keys securely](https://www.mailblastr.com/docs/kb/handling-api-keys) — keep `mb_` keys safe.

> **Note:** Looking for the endpoint-level reference instead? Start with the [emails API](https://www.mailblastr.com/docs/api/emails-send), [domains](https://www.mailblastr.com/docs/domains/managing), and [webhooks](https://www.mailblastr.com/docs/webhooks/overview).