Warmup Best Practices
Follow these best practices to get the most out of email warmup and build a strong sender reputation.
Do:
- Run warmup for at least 2-3 weeks before launching any cold email campaigns.
- Keep warmup running even after you start campaigns — switch to Maintenance mode to maintain your reputation.
- Configure SPF, DKIM, and DMARC DNS records before enabling warmup.
- Use Conservative ramp speed for brand-new domains with zero sending history.
- Start with a low daily volume (5-10 emails per day) and let the system ramp up naturally.
- Monitor your Health Score weekly and investigate any sudden drops.
Do Not:
- Do not use Aggressive ramp on a new domain — this can trigger spam filters and damage your reputation before it is established.
- Do not set your daily warmup volume above 30 in the first week.
- Do not start campaigns from a mailbox with a Health Score below 60.
- Do not disable warmup once campaigns are running — your reputation needs continuous reinforcement.
- Do not ignore Recovery mode — if the system switches your mailbox to Recovery, it detected a problem that needs attention.
Timelines to Expect:
- Brand-new domains: 4-6 weeks to build a solid reputation.
- New mailboxes on established domains: 2-3 weeks.
- Recovery from reputation damage: 2-4 weeks of consistent warmup.
- Domain age matters — older domains with some history warm up faster.
When to Adjust Settings:
- If your score stays above 80 for 2+ weeks, you can consider increasing daily volume.
- If bounces spike, check your DNS records and mailbox connection immediately.
- If spam rate exceeds 5%, the system will auto-switch to Recovery mode — let it work before making manual changes.