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New sending domains and IPs need to ramp up gradually — mailbox providers distrust a cold identity that suddenly sends at volume. Senderz handles warmup and reputation monitoring for you.

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Domain warmup

Warmup is gated on verification and starts automatically the moment a domain first verifies. It’s a display and scheduling ramp — a progress signal that your domain is establishing reputation.

Auto-start

Verifying a domain kicks off warmup. No manual step.

Read-only for tenants

The domain card shows warmup progress (day, volume sent, reputation) with no pause/resume — a pausable control on shared infrastructure is a footgun.

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Accelerated migration

Moving from another provider with an established reputation? Request an accelerated warmup from the domain card (provider + monthly volume). An operator reviews and approves, which jumps the ramp to full cap. Decisions are audit-logged and you’re notified.

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IP pools

Sends are placed on the least-loaded eligible IP under a daily cap. Warming IPs advance on a reputation-gated schedule. This is managed by Senderz — you don’t configure IPs.

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Reputation monitoring

Senderz polls external reputation sources and routes the scores:
  • Microsoft SNDS (Outlook) → IP reputation.
  • Google Postmaster Tools → per-IP and per-domain reputation.
Scores feed the warmup gate: a bad reputation quarantines, low reverses the ramp, medium holds. Both per-IP and per-domain scores surface in the deliverability view.
Reputation is polled every few hours. A bad-reputation gate can pause or reverse warmup on a degrading IP automatically.

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Per-tenant deliverability monitoring

Because email can route through a shared relay, Senderz ranks every workspace and sending domain by bounce and complaint rate over a rolling window. If a workspace or domain breaches the thresholds (bounce warn 5% / crit 10%; complaint warn 0.1% / crit 0.3%), operators are alerted with the offenders named — so a degrading sender is caught before it hurts the pool.
Keep your bounce rate under 5% and complaint rate under 0.1%. High rates risk suspension of your sending. Import clean lists (see Importing contacts) and honour unsubscribes promptly.