The rules this server enforces, written down mostly so future me stays consistent.
| Rule | Detail |
|---|---|
| Rate limits | Max 50 messages/hour per sender identity; the server's job is alerts, not newsletters. |
| No forwarding loops | Aliases deliver locally; no open forwarding to external providers. |
| Archive | All outbound messages kept with full headers for a year. |
| Rule | Detail |
|---|---|
| Greylisting | New triplets deferred 60s once; cuts most bot delivery without human cost. |
| Rspamd score | Reject above 12, quarantine 6–12, deliver below 6. Thresholds reviewed quarterly. |
| Size limits | 25 MB per message; larger transfers belong on CloudHub share links anyway. |
| TLS | Opportunistic inbound, required outbound to providers that support it. |