Add additional domains
Introduce new sending domains without starving or contaminating existing warm identities.
- Difficulty:
- Advanced
- Prerequisites:
- Clear stream separation plan, Warmup capacity
- Last updated:
- 2026-07-15
- Author:
- empire
Objective
Scale sending safely
Increase sending volume on an already warm identity without triggering filters.
Starting state
Existing warm domain(s); need more sending identities
Prerequisites
- Clear stream separation plan
- Warmup capacity
Estimated time
2–4 hours
Difficulty
advanced
Required access
- DNS
- ESP
- CRM
Inputs
- New domains
- Which streams move
- Ramp schedule
Step-by-step instructions
- Define purposeAssign each new domain a stream (e.g. marketing vs lifecycle).
- Authenticate and warmComplete auth and a dedicated warmup before moving meaningful volume.
- Migrate traffic graduallyShift cohorts in slices; keep the original domain healthy as fallback.
Verification
- New domain metrics stable before next slice moves
Common mistakes
- Park all volume on a brand-new domain overnight
- Share IPs across domains or isolate?
Rollback / recovery
- Return traffic to the prior warm domain
Expected outcome
Additional domains carry planned streams without burning them.
When to escalate
- New domain filtered while old domain remains healthy