The Mailgun API Datasource supports for interaction with the mail endpoint of the [Mailgun API](https://documentation.mailgun.com/en/latest/api-intro.html#authentication-1).
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## Connection
To establish a connection with the MailGun data source, click on the `+Add new data source` button located on the query panel or navigate to the [Data Sources](https://docs.tooljet.com/docs/data-sources/overview) page from the ToolJet dashboard.
Enter your **Mailgun API key** in the "API key" field.
:::tip
Mailgun API key is required to create an Mailgun datasource on ToolJet. You can generate API key by visiting [Mailgun account page](https://app.mailgun.com/app/account/security/api_keys).
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Click on the 'Save' button to save the data source.
**Send a single email to multiple recipients** - The `Send mail to` field can contain an array of recipients, which will send a single email with all of the recipients in the field.
**Send multiple individual emails to multiple recipients** - set <b>Multiple recipients</b> field to `{{true}}` and the `Send mail to` field will be split into multiple emails and send to each recipient.