We previously built and scaled TheChecker, an email deliverability SaaS used by Netflix, Mojang (Minecraft), and 6,000+ paying users worldwide. It was later acquired and became Emailable.
Now we’re building MailDock — a fully-managed, plug-and-play mailbox designed specifically for cold emailers.
It replaces Google Workspace seamlessly, with no changes to your existing workflow.
It’s like having a deliverability expert on call 24/7, monitoring, optimizing, and proactively fixing issues — for just $2/mo per mailbox.
We’re still early, but some tests showed very promising results and cost savings.
Would love your feedback, questions, and brutal honesty.
What has deliverability been like?
Been doing immunotherapy for allergies for 3 years and it is a complete game changer. Last year was the first year I could breathe through my nose for the entire year. No more stuffy months.
I cycle frequently and the impact of the weight loss and added strength has made me feel much faster this year (and it's still rainy/cold season).
1. Exploratory Customer Development - Start with broad conversations. Reach out to potential customers and ask them about their world: their challenges, goals, and frustrations. Don’t pitch your idea, just listen. The goal is to uncover problems worth solving.
2. Focused Customer Development - Once you notice a pattern in the problems people describe, you want to make sure it's shared by a wide subset of customers.
3. Paper Feedback Demo - Before building anything new, create a low-fidelity prototype (mock-ups, sketches, or slides) of how you might solve the problem. Share it with prospects and get their feedback.
4. Real Feedback Demo - When you have a working version of your product, test it with those same prospects and ask for feedback. The goal is to see if the thing actually solves their pain. If it does, you can invite them into a sales process. “Looks like it might help, can we set up some time to explore what it would look like to implement at your company?”
This approach isn’t magic but it works. The best part is that it teaches you how to find customers and what messaging will resonate with them. Resources like The Mom Test by Rob Fitzpatrick are great for learning how to have these conversations without bias.
If we were getting opinions on the latest PhD paper on attention mechanisms than I’d trust someone with a PhD versus a random person, but for getting opinions on the new Google phone? Think for yourself.
Two things:
1. He's held / seen the phone live, I buy online so won't get a chance to before I decide.
2. He's also held hundreds (thousands?) of phones which I haven't.
While he does have preferences that differ from mine, his perspective is still interesting.
>what qualifies them?
19.3m subscribers on yt