Deliverability
From setup to delivery, every step has a fallback — hand us your mail with confidence.
One-click DNS verify
After you bind a domain, SPF / DKIM / DMARC and verify records are generated automatically; you verify in one click before it goes live — better inbox placement from the start.
Automatic retry
Temporary send failures are retried automatically — no manual resend — to lose no mail where possible.
Crash self-healing
A periodic self-heal sweeps expired and orphan resources (stale idempotency keys, ownerless attachments) and recovers after a kill or power loss, leaving no half-done tasks.
Anti-abuse rate
Built-in sending-rate and quota sliding windows; over-limit returns 429 with retry_after — protecting sender reputation and your quota alike.
Encrypted credentials
Sending keys and upstream credentials are stored encrypted at rest; the plaintext key is shown only once at creation.
Instant invalidation
Account deletion / ban takes effect immediately, checked every request; an invalidated account can neither send nor receive.
Want the best deliverability?
Binding your own domain and configuring the DNS records, then passing the one-click verify, is the single most effective step.