How to warm up a new email domain for cold outreach?
Start by sending 10 to 20 emails per day from your new domain, increasing volume by 20% each week until you reach your target send rate after 4 to 6 weeks. Use real back-and-forth conversations early, keep bounce rates below 3%, and maintain open rates above 20% before launching full sequences. OnyxSend's warm-up layer handles this automatically, so your first cold sequences hit inboxes instead of spam folders and every qualified reply flows straight into your meeting-booking workflow.
Evidence and detail
- Domains warmed over 4 to 6 weeks see 40% higher inbox placement rates than cold-launched domains, directly protecting reply rates and pipeline.
- Keeping daily send volume below spam thresholds during warm-up preserves sender reputation scores, which ISPs evaluate before routing bulk sequence emails.
- Pairing domain warm-up with SPF, DKIM, and DMARC authentication reduces spoofing flags and lifts deliverability by up to 25% across multi-channel outreach campaigns.
Related reading
- /blog/email-deliverability-checklist-for-cold-outreach
- /blog/how-to-set-up-spf-dkim-dmarc-for-cold-email
- /blog/cold-email-sequence-structure-that-books-meetings
- /blog/how-many-cold-emails-to-send-per-day
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