The Drip.
One mail a month, no marketing.
Deliverability deep dives, internals from the platform, and the occasional war story from a customer migration. ~1,800 words once a month, never spam, unsubscribe in one click.
6+ back issues · 4,200 subscribers · 0 unsubs in the last 30 days (we checked)
// back issues
- #018
Dedicated IP warming, the math behind the curve
Why we double sends every 36 hours instead of doubling daily — and how to set the start volume for a brand-new IP.
DeliverabilityIP warmingMath - #017
BIMI is finally worth shipping
After three years of "soon", Apple Mail joined Gmail and Yahoo. Here is the 90-minute setup.
BIMIVMCBrand - #016
Idempotency, but for marketing campaigns
How we made bulk sends safe to retry without re-sending to the same recipient — at 100k recipients per call.
EngineeringBulk sendIdempotency - #015
Reading DMARC reports without losing your weekend
A 4-line jq pipeline + a Postgres table that turns aggregate reports into actionable alerts.
DMARCToolingjq - #014
A field guide to spam-trap data
The five trap categories, why a 0.05% hit rate ends careers, and how to clean a list before you send.
Spam trapsList hygiene - #013
The 2024 Gmail/Yahoo rules, eight months in
What broke, what didn't, and which third-party senders just gave up. With real placement numbers.
ComplianceDeliverability