Email
Deliverability
A one-page guide to keep your cold emails out of spam and in your buyer’s inbox.
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What's Inside
Domain setup basics
When to use secondary domains for outbound and how to warm them up gradually so you don’t burn your primary domain’s reputation.
Authentication and diagnostics
SPF, DKIM, DMARC explained in plain language, plus how to use tools like MXToolbox and Instantly to confirm everything’s configured correctly.
Sending limits and ramp-up
Recommended daily send ranges per inbox, and how to step up volume while optimizing for engagement: opens, replies, and forwards.
Deliverability killers to avoid
The behaviors that tank your domain: bad targeting, spammy follow-ups, outdated lists, links/attachments in first touch, open tracking pixels, and missing one-click unsubscribe.
Quick wins to protect reputation
How to write for replies (even “no” replies), track key signals (spam, unsubscribes, negative responses), and test messages in tools like Mail Tester.
Ready to Rethink Outbound?
Gap Prospecting is the blueprint for a new era of top-of-funnel.