grafana/emails/templates/ng_alert_notification.mjml

<mjml>
  <mj-head>
    <!-- ⬇ Don't forget to specifify an email subject below! ⬇ -->
    <mj-title>
      {{ Subject .Subject .TemplateData "{{ .Title }}" }}
    </mj-title>
    <mj-include path="./partials/layout/head.mjml" />
    <!-- Summary of the email contents, this will go in the email preview -->
    <mj-include path="./partials/alerting/summary.mjml" />
  </mj-head>
  <mj-body>
    <mj-section>
      <mj-include path="./partials/layout/header.mjml" />
    </mj-section>

    <!-- This is our grouping header, it says what grouping labels have been applied to this email -->
    <mj-include path="./partials/alerting/grouping_labels.mjml" />

    <!-- custom email message -->
    <mj-raw>
      {{ if .Message }}
    </mj-raw>
    <mj-wrapper background-color="#22252b" border="1px solid #2f3037" padding="0">
      <mj-section padding="0">
        <mj-column>
          <mj-text align="left">
            <mj-raw>
              {{ range $line := (splitList "\n" .Message) }}
            </mj-raw>
            {{ $line }}<br />
            <mj-raw>
              {{ end }}
            </mj-raw>
          </mj-text>
        </mj-column>
      </mj-section>
    </mj-wrapper>

    <!-- end custom email message -->
    <mj-raw>
      {{ else }}
    </mj-raw>

    <!-- default template -->

    <!-- Firing instances -->
    <mj-raw>
      {{ if .Alerts.Firing  }}
    </mj-raw>

    <!-- Firing header -->
    <mj-section padding="0">
      <mj-column>
        <mj-text padding="0">
          <h3>🔥 {{ .Alerts.Firing | len }} firing instances</h3>
        </mj-text>
      </mj-column>
    </mj-section>

    <!-- Firing instances loop -->
    <mj-raw>
      {{ range .Alerts.Firing }}
    </mj-raw>
    <mj-wrapper background-color="#22252b" border="1px solid #2f3037" padding="0">
      <mj-include path="./partials/alerting/firing_instance.mjml" />
      <mj-include path="./partials/alerting/instance_details.mjml" />
    </mj-wrapper>
    <mj-section padding="10px" />

    <!-- end Firing instances loop -->
    <mj-raw>
      {{ end }}
    </mj-raw>

    <!-- end Firing instances section -->
    <mj-raw>
      {{ end }}
    </mj-raw>

    <!-- Resolved instances -->
    <mj-raw>
      {{ if .Alerts.Resolved }}
    </mj-raw>

    <mj-section padding="0">
      <mj-column>
        <mj-text padding="0">
          <h3>✅ {{ .Alerts.Resolved | len }} resolved instances</h3>
        </mj-text>
      </mj-column>
    </mj-section>

    <!-- Resolved instances loop -->
    <mj-raw>
      {{ range .Alerts.Resolved }}
    </mj-raw>
    <mj-wrapper background-color="#22252b" border="1px solid #2f3037" padding="0">
      <mj-include path="./partials/alerting/resolved_instance.mjml" />
      <mj-include path="./partials/alerting/instance_details.mjml" />
    </mj-wrapper>
    <mj-section padding="10px" />

    <!-- end Resolved instances loop -->
    <mj-raw>
      {{ end }}
    </mj-raw>

    <!-- end Resolved instances -->
    <mj-raw>
      {{ end }}
    </mj-raw>

    <!-- end default template -->
    <mj-raw>
      {{ end }}
    </mj-raw>

    <mj-section padding-top="10px">
      <mj-include path="./partials/layout/footer.mjml" />
    </mj-section>
  </mj-body>
</mjml>