> For the complete documentation index, see [llms.txt](https://help.checkoutchamp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.checkoutchamp.com/crm/plugins/smtp-maintenance/maropost-smtp-profile.md).

# Maropost SMTP Profile

This guide will show you how to configure your SMTP profile to support using an API key with Maropost.

1. Navigate to Admin → Plugins → SMTP Maintenance

* Click the *Add Mail Server* \[+] button or the edit button associated with your Maropost SMTP Profile
* Set the form fields like as:

**Host Name:** smtp.maropost.com

​**Username**: apikey (Not your actual API key- type in “apikey”)

**Password**: Your API key from Maropost

**From Email**: the address associated with this SMTP Profile

**Port number:** 587

**Use SSL:** unchecked

**Use Relay:** checked

**Custom Headers (\* indicates required):**

   **\* X-ApiKey:** Your API key from Maropost

   **\* X-AccountID:** Your Maropost Account ID

   \* **X-CampaignName**: The unique lookup key for the transactional campaign

   \* **X-CampaignID**: The Transactional Campaign ID that you have created within Maropost for Marketing. *This x-header is required ONLY if your Maropost Marketing Cloud Account ID is between 1 and 999.*

   \* SMTPAutoTLS:false             This custom header must be included with *false* for Maropost SMTP to work properly.

<figure><img src="/files/g84IPUwuMhWxPajXJ87F" alt=""><figcaption><p>Checkout Champ - Maropost SMTP</p></figcaption></figure>

Optional SMTP Headers and more SMTP information can be found [here](https://galaxy.maropost.com/s/article/Sending-Transactional-Campaigns-via-SMTP).