What is a deliverability consultant?
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A deliverability consultant is the person you call when your emails aren't landing in the inbox and you can't figure out why. They diagnose what's blocking your sends (authentication problems, list quality issues, sender reputation damage, technical misconfigurations) and tell you how to fix it.
What they actually do: audit your sending infrastructure (SPF, DKIM, DMARC), review your list practices (how you collect subscribers, how often you clean your lists, how you handle bounces and complaints), analyze engagement patterns (open rates by domain, spam complaint rates, unsubscribe velocity), check your domain and IP reputation across major mailbox providers, and decode cryptic bounce messages into plain English action steps.
Most businesses need a consultant in one of three situations. First: something broke. Your password resets suddenly started landing in spam, or Gmail is silently dropping your transactional emails, or you got blocklisted and don't know why. Second: you're stuck at a ceiling. Your open rates flatlined, your campaigns never hit the inbox at major providers, or you're growing but your deliverability is getting worse. Third: you're migrating infrastructure (switching ESPs, moving to a dedicated IP, consolidating brands) and don't want to torch your sender reputation in the process.
What they don't do: write your email copy, design your templates, or manage your campaigns. That's marketing. Deliverability consultants focus on the technical layer between "hit send" and "lands in inbox."
When to DIY vs. hire help: if you're just starting out and sending under 10,000 emails a month from a reputable ESP like Mailchimp or Brevo, you probably don't need a consultant yet. The ESP's defaults will carry you. But if you're sending 50,000+ emails a month, using multiple sending domains, running both marketing and transactional streams, or dealing with persistent inbox placement problems, a consultant pays for themselves quickly. The cost of lost revenue from emails that never arrive usually dwarfs the consulting fee.
If you're diagnosing a specific technical issue right now (broken DMARC, sudden blocklisting, authentication failures), start with our free diagnostic tools. If the tools don't solve it or you're not sure what you're looking at, talk to us. No pitch, just help.
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