How DMARC progression actually works
Why we walk from p=none to p=reject in 6 steps with safety gates, not a single CLI flag. What happens when one source fails alignment.
Reply Intelligence — the 9 intent classes
What each class means, what triggers it, what a typical confidence score looks like in production.
Subdomain CNAME delegation — the trust gradient
Why we take 2 CNAMEs + 1 TXT instead of your whole zone. What you can do that we can't, and vice versa.
Sending reputation for first-month senders
Warmup curves, complaint thresholds, what the deliverability score actually measures, when to add a dedicated IP.
WhatsApp template approval — the 80% rejection patterns
What Meta's reviewers actually look for. The categories most people get wrong, and the rewrites that fix them.
Webhooks vs polling for inbox sync
When you actually need webhooks, when polling is fine, why we use both internally for Gmail+IMAP.
Idempotency in transactional sends
Why we ship Idempotency-Key support in Q3 and what your code should do with it.
RTL rendering at every layer
From the template editor to the receiving WhatsApp client. Where Unicode bidi marks belong; where they don't.