
InboxFlood
Auto-subscribe your inbox to hundreds of real newsletters
I've been building InboxFlood, and last week I landed my first paying customer — fully organic, no ads, no outreach. Felt like the right moment to actually introduce it here.
The idea came from a problem that kept bothering me: testing deliverability on a brand-new inbox tells you almost nothing. An empty inbox has no history, so there's nothing for its filter to learn from — sending a test campaign in and checking where it lands is basically meaningless.
InboxFlood fixes that by feeding an inbox hundreds of real newsletters every day, then having the user actually engage with that mail — opening it, reading it, interacting the way a real person would. That engagement is what trains the filter. Only once that's happened do you have an inbox actually worth testing real campaigns against.
Turns out it's useful for a couple of other things too — marketers use it to see what their whole niche is sending, and developers use it to get realistic inbox data for testing.
Still very early days (one real customer!), but wanted to start sharing the build here. Happy to answer anything about how it works or what's next.
About
InboxFlood exists because an empty inbox has no history for its filter to learn from, so testing campaigns against it tells you almost nothing. It feeds the inbox real newsletters daily.

1 Comment
The thing I'd probably be most nervous about after a first sale isn't whether the customer was right.
It's whether I'd become too certain about why they bought.
Those aren't always the same thing.