> ## Documentation Index
> Fetch the complete documentation index at: https://lightdash-docs-many-to-many.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Configure SMTP for Lightdash email notifications

This is a reference to all the SMTP environment variables that can be used to configure a Lightdash email client.

| Variable                          | Description                                                                |                   Required?                   | Default |
| :-------------------------------- | :------------------------------------------------------------------------- | :-------------------------------------------: | :-----: |
| EMAIL\_SMTP\_HOST                 | Hostname of email server                                                   | <Icon icon="square-check" iconType="solid" /> |         |
| EMAIL\_SMTP\_PORT                 | Port of email server                                                       |                      587                      |         |
| EMAIL\_SMTP\_SECURE               | Secure connection                                                          |                      true                     |         |
| EMAIL\_SMTP\_USER                 | Auth user                                                                  | <Icon icon="square-check" iconType="solid" /> |         |
| EMAIL\_SMTP\_PASSWORD             | Auth password                                                              |                      \[1]                     |         |
| EMAIL\_SMTP\_ACCESS\_TOKEN        | Auth access token for Oauth2 authentication                                |                      \[1]                     |         |
| EMAIL\_SMTP\_ALLOW\_INVALID\_CERT | Allow connection to TLS server with self-signed or invalid TLS certificate |                     false                     |         |
| EMAIL\_SMTP\_SENDER\_EMAIL        | The email address that sends emails                                        | <Icon icon="square-check" iconType="solid" /> |         |
| EMAIL\_SMTP\_SENDER\_NAME         | The name of the email address that sends emails                            |                   Lightdash                   |         |

\[1] `EMAIL_SMTP_PASSWORD` or `EMAIL_SMTP_ACCESS_TOKEN` needs to be provided