// open problems

Leads

Problems I dug into until I could decide — and the questions I couldn't close.

6 of them are still open. If you've built in one of these markets, sold into one, or bought from one, you probably know something I don't. Tell me and I'll give you everything I have.

Dead leads stay up. The reasoning is the useful part.

killed after research2026-07-176 open questions

DMARC / email authentication

The problem
Anyone can send email pretending to be your domain, and since 2024 the mailbox providers reject you if you haven't stopped them. The fix is a spec, a feed of unreadable XML, and a migration that can black out your own invoices if you get it wrong. Nobody wants to learn it.
Scope
~85% of apex domains unprotected · 2.5% at enforcement · 70+ commercial vendors · price floor $6–15/mo · Bangladesh: functionally zero
Where it landed
Real global market, reachable by nobody I am. My local market is already sold to foreign vendors, the bottom of it doesn't send email at all, and 70+ competitors sit between me and a buyer who has never heard of me.
EmailDNSSecurityKilled after research
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