# TrackMailer

- [HTML](https://docs.trackmailer.io/)
- [Markdown](https://docs.trackmailer.io/index.md)
- [llms-full.txt](https://docs.trackmailer.io/llms-full.txt)

## On this page

- [Getting started](https://docs.trackmailer.io/#getting-started)
- [Before you integrate](https://docs.trackmailer.io/#availability)
- [Create and store an API key](https://docs.trackmailer.io/#api-keys)
- [Create or update a contact](https://docs.trackmailer.io/#contacts-upsert)
- [Synchronize ModelBoost account preferences](https://docs.trackmailer.io/#contacts-sync)
- [Add to or remove from a list](https://docs.trackmailer.io/#list-membership)
- [Unsubscribe and suppression](https://docs.trackmailer.io/#responsible-sending)
- [Prepare a sender domain](https://docs.trackmailer.io/#sender-domains)
- [Anti-Spam Health: DKIM, SPF and DMARC](https://docs.trackmailer.io/#deliverability-health)
- [Send a transactional email](https://docs.trackmailer.io/#transactional-email)
- [Newsletter API planning](https://docs.trackmailer.io/#newsletter-api)
- [Validate before sending](https://docs.trackmailer.io/#sandbox)
- [Responses, status and retries](https://docs.trackmailer.io/#statuses)
- [Groups, newsletters and sequences](https://docs.trackmailer.io/#newsletter-and-sequences)

## Language

- [English](https://docs.trackmailer.io/llms.txt)
- [Deutsch](https://docs.trackmailer.io/de/llms.txt)
- [Español](https://docs.trackmailer.io/es/llms.txt)