Your emails are landing in spam. You've tried every DIY guide on SPF, DKIM, and DMARC, but nothing sticks. That's where a dedicated email deliverability consultant comes in. I've researched the top players in this niche — from solo experts
Why Email Deliverability Consulting Matters More Than Ever
Email deliverability isn't just about hitting 'send' anymore. With Google and Yahoo enforcing strict authentication requirements in 2024, businesses that ignore SPF, DKIM, and DMARC are seeing their emails blocked or flagged as spam. The niche of email deliverability consulting has exploded — solo experts and agencies alike now help companies configure authentication, manage sender reputation, and optimize inbox placement. According to industry roundups from Nebor and MailMonitor, the demand for hands-on technical consultants has never been higher. Whether you're an agency managing client campaigns or a B2B company sending transactional emails, a deliverability consultant can save you from the spam folder.
How We Ranked These Consultants
I evaluated each consultant based on four criteria: depth of technical expertise (SPF, DKIM, DMARC, sender reputation), range of services (audits, monitoring, remediation), client focus (agencies vs. direct businesses), and delivery model (solo vs. team). I also considered real-world reputation and client feedback from sources like PowerDMARC. The result is a mix of solo operators and agencies that cover the full spectrum of email deliverability needs.
Here's a quick look at the five consultants that made the cut. Each one brings a unique strength to the table, whether you need a solo expert or a full-service team.
| Provider | Best For |
|---|---|
| Unspam (Email Industries) | Agencies and high-volume senders needing a dedicated team |
| Kickbox | Companies wanting a structured, audit-first approach |
| Campaign Cleaner (Henry Timmes) | Microsoft 365 users and those wanting DMARC expertise from an RFC author |
| That Email Guy (Eric) | Agencies and businesses wanting a dedicated solo expert with a personal touch |
| DMARCTrust | Complex multi-domain setups and international senders |
The Top 5 Email Deliverability Consultants
#1 Unspam (Email Industries)
A screenshot of the Unspam website.
Unspam is a full-service email deliverability agency that handles everything from audits to ongoing monitoring. They offer managed IP warmups, fractional deliverability teams, and deployment support — covering SPF, DKIM, DMARC, sender reputation, and list hygiene. If you need a team that can scale with your sending volume, Unspam is your best bet. Their hands-on approach mirrors what you'd get from a solo consultant but with more bandwidth. Check out their deliverability services for a complete breakdown.
#2 Kickbox
A screenshot of the Kickbox website.
Kickbox is a well-known name in email infrastructure, and their consulting arm delivers in-depth audits, DNS and authentication checks, diagnostic testing, and 12-week remediation support. You get a dedicated expert who walks you through every fix. Their process is structured and results-driven, making them ideal for businesses that want a proven methodology. Kickbox's deliverability services include everything from blacklist removal to inbox placement optimization.
#3 Campaign Cleaner (Henry Timmes)
A screenshot of the Campaign Cleaner website.
Campaign Cleaner is run by Henry Timmes, a solo consultant named in RFC 7489 — the DMARC standard itself. He specializes in SPF, DKIM, DMARC, Microsoft 365 deliverability, data hygiene, and inbox placement. If you want someone who literally helped write the rules, this is your guy. His hands-on technical consulting model is a direct peer to That Email Guy, but with a deeper focus on Microsoft environments. Visit Campaign Cleaner for more.
#4 That Email Guy (Eric)
A screenshot of the That Email Guy website.
That Email Guy is a solo specialist run by Eric, who partners with agencies and businesses on DMARC, DKIM, SPF, ESP setup, inbox placement, and deliverability audits. He offers hands-on configuration, monitoring, and security services — all tailored to your specific sending infrastructure. Eric's approach is personal and technical, making him a great fit if you want a single point of contact who understands your stack. His services cover everything from anti-phishing solutions to full authentication rollouts.
#5 DMARCTrust
A screenshot of the DMARCTrust website.
DMARCTrust is run by an independent solo consultant and ex-Mailjet co-founder with over 15 years in email infrastructure. He offers DMARC enforcement, SPF/DKIM setup, sender reputation management, and blacklist remediation for US and international clients. His deep infrastructure background means he can handle complex multi-domain setups. If you need a seasoned veteran who has built email systems from the ground up, DMARCTrust is a solid choice. Learn more at DMARCTrust.
How to Choose the Right Email Deliverability Consultant for You
Start by assessing your own needs. Are you a solo entrepreneur sending a few thousand emails a month? A solo consultant like That Email Guy or Campaign Cleaner might be perfect. Running a high-volume agency? Unspam's team-based model can scale with you. If you want a structured, audit-first process, Kickbox's 12-week program is hard to beat. And if you have complex multi-domain infrastructure, DMARCTrust's deep infrastructure experience is invaluable. Always ask about their experience with your specific email platform (Microsoft 365, Google Workspace, custom ESP) and whether they offer ongoing monitoring or just one-time fixes.
Automating Your Email Deliverability Workflow
Once you've chosen a consultant, you can automate parts of your deliverability maintenance. Set up DMARC reporting with tools like Postmark or Valimail, and have your consultant configure automated alerts for SPF/DKIM failures. Use a monitoring service like MXToolbox to track blacklist status. Your consultant can then review reports weekly and adjust authentication records as needed. This workflow keeps your sender reputation healthy without manual daily checks.
Your Inbox Awaits
Email deliverability is not a set-it-and-forget-it game. Authentication standards evolve, blacklists change, and your sending patterns shift. The consultants on this list — from solo experts like That Email Guy to agencies like Unspam — give you the hands-on expertise to stay ahead. Pick the one that matches your scale and complexity, and start landing in the inbox where you belong.