Multi-Domain Warmup Strategy
Best practices for warming up multiple domains simultaneously.
Why Use Multiple Domains?
• Protect your primary domain — Use secondary domains for cold outreach so your main business domain stays clean.
• Scale volume safely — Each domain can send a limited amount per day. More domains = more total capacity.
• Risk isolation — If one domain gets flagged, your other domains continue working.
Domain Setup Strategy:
- Buy 2-5 secondary domains similar to your primary (e.g., if you own acme.com, buy acmehq.com, getacme.com, tryacme.com).
- Set up SPF, DKIM, and DMARC on each domain before connecting.
- Create 1-3 mailboxes per domain (don't create too many on a single domain).
- Point each domain to your website or create a simple landing page — email providers check if the domain has real web presence.
Warmup Approach:
- Start all domains in warmup simultaneously — there is no need to stagger.
- Use Conservative ramp speed for all new domains.
- Each mailbox warms up independently — they each build their own reputation.
- Wait until ALL domains reach Health Score 70+ before starting campaigns.
Campaign Distribution:
- Assign mailboxes from different domains to the same campaign using mailbox rotation.
- Round-robin rotation distributes sends evenly across domains.
- If one domain's health drops, disable its mailboxes from the campaign without stopping others.
Monitoring:
- Check each domain's SPF/DKIM/DMARC status in Analytics > Mailboxes.
- Monitor per-mailbox Health Scores — one unhealthy domain should not affect others.
- If a domain enters Recovery mode, reduce or pause campaigns for that domain while it recovers.
Common Mistakes:
- Using domains that look spammy (random characters, suspicious TLDs) — buy professional-looking domains.
- Not setting up DNS records on secondary domains.
- Putting too many mailboxes (5+) on a single new domain.
- Starting campaigns before warmup reaches healthy scores on all domains.