What I learned building an Email Platform that actually enforces deliverability

Hi All,

I've spent the last few months in the trenches building an email sending platform and along the way I picked up a few things that surprised me. Not about the code but about how poorly understood email deliverability is even among technical Founders who send email regularly.

Here's what stood out to me during this period:

Most platforms are built around convenience not protection

Every major email platform makes it easy to upload a list and hit send. None of them make it hard to do the wrong thing. You can import a list you bought 3 years ago, send to thousands from a brand new domain on day one and nobody stops you. The damage shows up 2 weeks later when your open rates collapse and you can't figure out why. By then it's far too late.

Domain reputation is more fragile than you think

Your sending domain has a reputation score with every major inbox provider. Gmail, Outlook and Apple Mail all track your bounce rate, complaint rate and engagement signals against your domain. Once that score drops it affects every email you send not just to the bad addresses. Recovering a damaged domain takes weeks of careful sending. Most Founders don't know this until it happens.

New domains need a warm-up period and almost nobody does it!

When you register a fresh sending domain it has zero sending history. Inbox providers are suspicious of new domains sending volume immediately because that's exactly what spammers do. The right approach is to start with tiny send volumes and ramp up gradually over say 6 weeks while inbox providers learn to trust you. Most platforms either don't mention this or make it optional. It should be mandatory.

List verification isn't a one-time thing

Email addresses decay at roughly 2% per month. A list that was clean when you collected it a year ago could have 20% invalid addresses now. Every invalid address you send to is a potential bounce. Enough bounces and your domain reputation tanks. Verifying before sending is the difference between protecting your domain long term and slowly destroying it.

What I built

After running into these problems I built HighVolume.ai an email sending platform for Newsletter operators that makes all of the above non-negotiable rather than optional. List verification runs when a new address is added. New domains go through an enforced 6 week warm-up schedule. Bounce spikes trigger automatic throttling. Complaint signals trigger automatic pausing. A dedicated sending domain is required so your main website domain stays untouched.

It's currently invite only while I onboard the first users carefully. If you send a legitimate newsletter (opt in list, etc) and deliverability keeps you up at night I'd love to have you try it.🤝

Happy to answer any questions about the build, the stack or email deliverability in general in comments... 🫡