Almost all settings live in the SQL config table (see Configuration overview). The table is seeded with defaults on first run and edited in the dashboard. This page is the full key reference.
In the Restart? column, “Yes” means changing the key requires a service restart to take effect; “No” means the change applies live.
| Key |
Default |
Restart? |
Notes |
listener.ports |
[25, 587] |
Yes |
JSON int array; listener falls back to 2525 if 25 can’t be bound (in use / no privilege) |
listener.server_name |
"Dispatch" |
Yes |
SMTP banner / HELO name |
listener.allowed_cidrs |
loopback + RFC1918 |
No |
JSON string array; closed by default (not an open relay) |
listener.max_message_bytes |
26214400 (25 MiB) |
No |
per-message ceiling |
listener.require_auth |
false |
No |
require SMTP AUTH |
listener.allow_unsecure_auth |
false |
No |
allow AUTH before STARTTLS |
listener.connection_timeout_seconds |
60 |
No |
idle connection timeout |
listener.max_connections |
100 |
No |
concurrent connection cap |
See TLS certificate for how to generate or upload the shared cert.
| Key |
Default |
Restart? |
Notes |
tls.cert_path |
"" |
Yes |
path to PFX |
tls.cert_password |
"" (encrypted) |
Yes |
encrypted at rest |
tls.cert_source |
"" |
No |
"generated" or "uploaded" |
| Key |
Default |
Restart? |
Notes |
spool.directory |
"./.dispatch-spool" |
Yes |
spool root directory |
spool.worker_count |
4 |
Yes |
concurrent delivery workers |
spool.max_retries |
3 |
No |
delivery attempts before failure |
spool.retry_delays_seconds |
[30,300,1800] |
No |
JSON array; exponential back-off |
See HTTP API for usage.
| Key |
Default |
Restart? |
Notes |
api.enabled |
true |
No |
master toggle for the ingestion API |
api.port |
8025 |
Yes |
plain HTTP |
api.http_enabled |
true |
Yes |
toggle plain HTTP |
api.tls_enabled |
false |
Yes |
enable HTTPS listener |
api.tls_port |
8026 |
Yes |
HTTPS port (shared TLS cert) |
api.allowed_cidrs |
loopback + RFC1918 |
No |
closed by default |
api.max_message_bytes |
26214400 (25 MiB) |
No |
per-message ceiling |
api.rate_limit_per_key |
100 |
No |
requests/minute per API key |
| Key |
Default |
Restart? |
Notes |
webui.port |
8420 |
Yes |
HTTPS-only |
webui.allowed_cidrs |
[] (allow all) |
No |
open by default, password-gated |
webui.session_timeout_minutes |
480 |
No |
8 hours |
webui.require_https |
true |
No |
enforce HTTPS |
| Key |
Default |
Restart? |
Notes |
logging.log_delivered |
true |
No |
record delivered messages |
logging.log_retrying |
true |
No |
record retry attempts |
logging.log_denied |
true |
No |
record denied/rejected messages |
See Retention & purge for behavior.
| Key |
Default |
Restart? |
Notes |
purge.enabled |
true |
No |
enable scheduled purge |
purge.schedule_interval_hours |
6 |
No |
how often purge runs |
purge.spool_failed_retention_days |
30 |
No |
failed spool file retention |
purge.captured_retention_days |
7 |
No |
Local Inbox capture retention |
purge.log_delivered_retention_days |
30 |
No |
delivered log row retention |
purge.log_failed_retention_days |
90 |
No |
failed log row retention |
purge.audit_retention_days |
90 |
No |
audit log retention |
purge.audit_security_retention_days |
7 |
No |
security audit entry retention |
purge.size_trigger_gb |
9.5 |
No |
start size-based purge at this DB size |
purge.size_target_gb |
9.0 |
No |
purge down to this |
A few items cannot live in the config table because they are needed before the database is available, or because they secure the dashboard itself. The SQL connection string, the first-run admin password, the dashboard TLS certificate, and the log directory live in appsettings.json instead - see the Configuration overview.
