We'll look at your domain reputation, authentication setup, and sending infrastructure to pinpoint why your emails aren't reaching inboxes.
You'll leave with a clear understanding of what needs to happen - whether that's working directly with Microsoft, cleaning up your data, or reconfiguring your infrastructure.
Bad data is the #1 reason deliverability tanks. We'll discuss whether your lists have hidden landmines - outdated contacts, departed employees, or addresses flagged by security systems.
This call is 100% free - no obligation, no pitch. If we can help further, we'll let you know what that looks like. But the call itself is about giving you answers.
RFC 7489 is the IETF document that defines DMARC - the email authentication protocol now required by Gmail, Yahoo, and Microsoft for all bulk senders. It was developed by a consortium of the world's largest email providers. Henry Timmes is named in the acknowledgements section alongside contributors from these organizations - one of the few independent consultants in that document.
Contributors to RFC 7489 included representatives from:
Henry Timmes is listed among these contributors as an independent specialist - not a representative of any single corporation.
View RFC 7489 on IETF DatatrackerOffice 365 • Gmail • Yahoo • Hotmail • G-Suite
As an email deliverability consultant, I've built my career around solving inbox placement problems that most tools and platforms can't diagnose. My name is Henry Timmes, and I founded Unlock The Inbox, ZeroBounce, Postbox US, and Campaign Cleaner - each focused on enhancing different aspects of email performance.
If you're looking for a thorough email audit, ongoing support, or expert help setting up and configuring your email for optimal delivery - I'm here to help.
I specialize in B2B data hygiene and Office 365 deliverability. Poor deliverability is often caused by bad data, which is the #1 reason response rates plummet. It doesn't just affect inbox placement - it can also damage your sender reputation and get you blacklisted.
When I talk about data hygiene, I'm not just referring to running your list through a basic email validation tool. Those tools are often the reason you got in trouble in the first place - labeling addresses as "valid" when they aren't. In the B2B world, "valid" just means the email didn't bounce. It doesn't mean the person is real, reachable, or still with the company. I help you identify and remove emails tied to people who've moved on, retired, or passed away - and where possible, find the real email address instead.
I've seen email addresses continue "engaging" with campaigns - opening and clicking - even years after the owner passed away. Why? Because advanced email security systems like Proofpoint, Mimecast, and others simulate clicks and opens while scanning for threats. These systems also monitor how many inactive or non-existent addresses you're sending to, which can quietly damage your reputation.
Many outreach lists built through tools like Apollo, Seamless, or RocketReach contain hidden landmines that standard validation won't catch:
These platforms are essential for outbound work. Identifying what's poisoning the data is where I come in.
Imagine sending to email addresses labeled as "active," but in reality, you're targeting spam filter bots that monitor inactive or non-existent accounts first. Instead of reaching real people, you're triggering systems that quietly mark you as a risk.
I'm proud to be one of the few individuals named on the DMARC Standard (RFC 7489), having contributed to one of email's core security frameworks alongside representatives from Google, Microsoft, Yahoo, and PayPal. That foundational work is what informed the tools at Campaign Cleaner, including the Mail Tester, DMARC Lookup, and DMARC Generator. Over the years, I've worked with Fortune 500 companies and small businesses alike to refine their email strategies and drive better results.
With a strong background as a developer and coder, I specialize in automating processes and building tools to solve unique challenges. This technical expertise allows me to deliver customized solutions that simplify complex tasks, save time, and boost efficiency.
I understand that every company's email needs are different - whether you're sending product announcements, weekly promotions, sponsored content, affiliate campaigns, website traffic drivers, or cold outreach. Let's work together to ensure your email campaigns perform at their best.
"Together with our Chief Technology Officer Henry Timmes, he wrote our comprehensive Email Deliverability Guide — so good it got picked up by Inc. magazine."
Recognized by Stripo in their Email Marketing Minds series as a leading email deliverability expert and industry contributor.
"Modern spam filters rely on behavioral signals such as spam complaints, message fingerprinting, and user engagement (opens, replies, deletions, etc.) to determine whether an email should land in the inbox, spam folder, or be blocked entirely."
"We implemented client-side data processing to increase privacy for our customers. Instead of sending sensitive information like form inputs or personal data directly to our server, we shifted certain tasks to be handled directly in the user's browser."
"Ensuring subscribers are active, engaged and qualified involves consistent, relevant communication and nurturing. I send out regular newsletters that provide useful information or insights, not just sales pitches, which helps in keeping the audience engaged."
"Making the form dead simple—short fields, bold call-to-action, and a crystal-clear promise—gets more sign-ups than anything flashy. A two-step opt-in process filters out casual browsers and pulls in people who are genuinely interested—they've already shown intent. I've seen this bump conversion rates by 20-30% compared to standard forms."
"Delivering emails starts with a correctly configured mail server."
"We used our knowledge and experience to create a complete guide for companies who are striving to improve their email marketing. This free resource can help a lot of marketers who create great content but are having a hard time delivering it to their audience."
Become a part of the Campaign Cleaner community today, and join countless satisfied customers who have witnessed significant improvements in their email deliverability and campaign success. Don’t let HTML issues hold you back; let Campaign Cleaner optimize your campaigns and boost your inbox rates.
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