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

# Email Alerts

> Get notified about server issues, build failures, and deployment problems.

Techulus Cloud can send email alerts when things go wrong. Alerts are delivered via SMTP to a configurable list of recipients.

## Alert Types

| Alert              | Trigger                                       |
| ------------------ | --------------------------------------------- |
| Server offline     | A server stops reporting to the control plane |
| Build failure      | A container image build fails                 |
| Deployment failure | A deployment fails during rollout             |
| Deployment moved   | A deployment is moved to a different server   |

## Configuration

Add the following environment variables to the control plane:

| Variable            | Description                                           |
| ------------------- | ----------------------------------------------------- |
| `SMTP_ENABLED`      | Set to `true` to enable alerts                        |
| `SMTP_HOST`         | SMTP server hostname                                  |
| `SMTP_PORT`         | SMTP port (e.g., `587`)                               |
| `SMTP_USERNAME`     | SMTP authentication username                          |
| `SMTP_PASSWORD`     | SMTP authentication password                          |
| `SMTP_ENCRYPTION`   | `starttls` or `tls`                                   |
| `SMTP_FROM_NAME`    | Sender display name (e.g., `Techulus Cloud`)          |
| `SMTP_FROM_ADDRESS` | Sender email address                                  |
| `SMTP_TIMEOUT`      | Connection timeout in milliseconds (default: `10000`) |
| `SMTP_ALERT_EMAILS` | Comma-separated list of recipient email addresses     |

Works with any SMTP provider — Amazon SES, Resend, Mailgun, Postmark, or your own mail server.