Grafana dashboard: Postfix
Description: Prometheus Postfix exporter metrics.

This dashboard parses data from the [Prometheus Postfix exporter](https://github.com/kumina/postfix_exporter/) and renders it in various graphics. Data can be aggregated across all mailservers or on a subset. Supports per-daemon message processing rate, queue message counts and sizes, delivery duration, rejection rates and TLS cipher usage.

Originally written by @BartVerc by adapted to normal exporter metrics by @anarcat.

Note that I do not actually use this dashboard anymore as there are significant issues with the postfix exporter. Instead I use a mtail-based approach, see this page for details: <https://gitlab.com/anarcat/grafana-dashboards>

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          "max": "1",
          "min": null,
          "show": true
        },
        {
          "format": "short",
          "label": null,
          "logBase": 1,
          "max": null,
          "min": null,
          "show": true
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,
      "dashes": false,
      "datasource": "${DS_PROMETHEUS}",
      "fill": 8,
      "gridPos": {
        "h": 7,
        "w": 12,
        "x": 12,
        "y": 84
      },
      "id": 30,
      "legend": {
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        "current": false,
        "max": false,
        "min": false,
        "show": false,
        "total": false,
        "values": false
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "percentage": true,
      "pointradius": 5,
      "points": false,
      "renderer": "flot",
      "seriesOverrides": [],
      "spaceLength": 10,
      "stack": true,
      "steppedLine": false,
      "targets": [
        {
          "expr": "rate(postfix_smtpd_tls_connections_total[5m])",
          "format": "time_series",
          "intervalFactor": 1,
          "legendFormat": "{{ protocol }}: {{ cipher }}, {{ trust }}",
          "refId": "A"
        }
      ],
      "thresholds": [],
      "timeFrom": null,
      "timeRegions": [],
      "timeShift": null,
      "title": "TLS protocol/cipher usage",
      "tooltip": {
        "shared": true,
        "sort": 2,
        "value_type": "individual"
      },
      "type": "graph",
      "xaxis": {
        "buckets": null,
        "mode": "time",
        "name": null,
        "show": true,
        "values": []
      },
      "yaxes": [
        {
          "format": "short",
          "logBase": 1,
          "max": 100,
          "min": 0,
          "show": true
        },
        {
          "show": false
        }
      ],
      "yaxis": {
        "align": false,
        "alignLevel": null
      }
    }
  ],
  "schemaVersion": 18,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_PROMETHEUS}",
        "definition": "",
        "hide": 0,
        "includeAll": true,
        "label": null,
        "multi": true,
        "name": "instance",
        "options": [],
        "query": "label_values(postfix_up,instance)",
        "refresh": 2,
        "regex": "",
        "skipUrlSync": false,
        "sort": 1,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-6h",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "5s",
      "10s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "1d"
    ],
    "time_options": [
      "5m",
      "15m",
      "1h",
      "6h",
      "12h",
      "24h",
      "2d",
      "7d",
      "30d"
    ]
  },
  "timezone": "",
  "title": "Postfix",
  "uid": "h36Havfik",
  "version": 8,
  "description": "Prometheus Postfix exporter metrics."
}