9 lines
423 B
Markdown
9 lines
423 B
Markdown
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# postfix
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**Outbound-only** SMTP relay. Used by grafana alerts, node-red flows, jenkins build notifications.
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- **Network**: `app` (internal services hit `smtp://postfix:25`)
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- **Ingress**: none — no port published, no listener facing internet
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- **Egress**: TCP/25 outbound to internet MX servers (or a smart-host relay)
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- **TODO**: SPF/DKIM/DMARC for `${POSTFIX_FROM_DOMAIN}`, smart-host config if WBD provides a relay
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