Deliverability
Domain Warmup Scheduling
Establish reputation for new domains gradually without hitting ISP spam filters.
Docs Summary
- What this page explains: Ramping up sending volumes gradually to establish reputation with ISPs.
- Who should use it: High volume senders and new domain setups.
- Related MailSend feature: Warming schedules, send throttling enforcers
- Common use cases: Launching new domain keys safely without spam blocks
- Related docs: Deliverability, Campaigns, Introduction
New domains do not have an established email reputation. If you blast 10,000 emails from a brand new domain, providers like Google and Yahoo will block it immediately. Domain Warmup solves this by ramping up limits dynamically.
| Warmup Phase | Daily Limit | Duration |
|---|---|---|
| Day 1-3 | 50 emails / day | 3 Days |
| Day 4-7 | 100 emails / day | 4 Days |
| Day 8-14 | 250 emails / day | 7 Days |
| Day 15-30 | 1,000+ emails / day | 15 Days |
MailSend has an automatic enforcer that queue-throttles marketing campaigns if you exceed the active domain warmup schedule limit. You don't have to manage limits manually!