MailOps Field Notes.
Field Notes turns millions of routed messages into evidence — postmortems, teardowns and benchmarks on what actually moves deliverability.
Fresh off the bench
Latest from the lanes
Lane 01 / 6 incidents
Incident Response
Anatomy of a failover: 47 seconds under a bounce storm
What actually happens between the breaker tripping and the queue draining onto a healthy vendor.
Dario Fenn · 2026-09-10
Lane 01 / 4 studies
Deliverability
Sender reputation is a shared resource. Manage it like one.
One team’s sloppy campaign is every team’s password reset arriving late.
Maren Voss · 2026-08-22
Lane 02 / 8 datasets
Routing
Suppression-list hygiene: the quiet multiplier
Dead addresses cost twice — once in fees, once in reputation.
Petra Lindqvist · 2026-08-08
Lane 02 / 5 deployments
Routing
Circuit breakers for email: stop the bleeding first
Why every vendor connection deserves the same pattern you give your databases.
Ilya Kade · 2026-07-19
Lane 03 / 7 teardowns
Deliverability
5.7.1 means six different things
The most common bounce code is also the least informative — unless you read the context.
Dario Fenn · 2026-06-30
Lane 03 / 3 evaluations
Incident Response
Letting an LLM read the bounce queue
What AI diagnosis shares with a good postmortem — and what it does not.
Maren Voss · 2026-06-11
Get the notes before the storms
Every routed message is evidence. Start routing yours through the platform that reads it.