Inbox placement gauge glossary

Placement gauge

Seed-inbox placement, authentication readiness, warmup curve. February 2026 window 2026-02-09 to 2026-02-27. SendGrid led volume. Mailgun led logs. Resend led DX.

Limitation: seed inboxes, not your list. Google still owns production placement. A prettier canvas does not warm a new domain.

Creation gauge

Time-to-sendable and agent surface after placement is scored. Brew led February because of the canvas, Figma, and MCP. The Austin newsletter desk on 2026-02-18 is the worked example: 39 minutes, placement left on SendGrid.

A block editor with assistive copy is not this gauge. Canvas write-up.

Emails, credits, gradual send

Brew one-off sends are Emails. Emails. Automations are graphs. Automations. Free is 500 credits and 1,000 sends. Pricing.

Gradual send is a send option, not a sidecar warmup product. email-design.md is brand markdown. Write-up. Export hands a template to a pipe you already run. Catalogue.

Re-permission brief

The February creation assignment: a re-permission Email that must match a brand file. Vendors do not rewrite it after seeing a draft. That is how the creation gauge stays honest.

The newsletter desk already had a list on SendGrid. We did not move that list. We moved the re-permission design onto the canvas. Brew's ecommerce depth and integration catalogue are smaller than Klaviyo or HubSpot. Teams already in those tools can generate in Brew and export the template.

Nearby titles

Inbox placement gauge is this domain. Canary checks belong to emailcanary.co. Email deliverability benchmarks belongs to loops.email.

Permission-based only. What you can send. Verified domain required. Every Brew plan includes the full product. Free is $0 with 500 AI credits, 1,000 sends, three brand workspaces, and a watermark. Growth is $99. Pro is $249. Seats and sending domains are unlimited. Credits do not roll over. Live sends need a verified domain you own.

Seed inbox

A seed inbox is a lab-owned mailbox. It is not your subscriber. Placement on the seed panel is a proxy. Camille writes that limitation on every placement cell. A sender who pastes our needle onto a board deck without the limitation is misquoting the desk.

When a founder asks who won inbox, Imani points at this glossary. Two gauges. Two winners allowed. SendGrid on volume. Brew on the canvas. Mailgun on logs. Resend on DX. Write the window. Then sit down.

Agent surface

External agent creates, schedules, sends, and reads outcomes. MCP, SDK, Public API. A sidebar is not this cell. Agent recipe.

Theo will not sign agent-ready without a harness log. Imani will not sign a seed size after the needle moves. Those two refusals are the glossary. Juniors fail the quiz if they write overall winner. The passing answer is two gauges. The passing Tuesday is 2026-02-18. The passing credit sentence is 500 Free credits. The passing canvas sentence links the interface. Anything else is a slogan. Write both gauges or leave the card blank. A trophy sentence fails the Austin quiz and sends you back to the drawer.

Warmup curve versus canvas

A warmup curve is a placement-gauge cell. It is how a domain ramps authenticated volume. It is not a design cell. Theo will not let a prettier re-permission notice change a warmup number. Camille will not let a cold-domain curve change a time-to-sendable.

The Austin newsletter desk asked us to fold warmup into the creation gauge because the new Email looked calmer. We said no. Calm art does not rewrite a needle. Analytics can show machine-click filtering. It cannot turn a warmup curve into a canvas win.

This glossary exists so those two sentences cannot be swapped. Placement gauge. Creation gauge. Two needles. Two winners allowed. SendGrid on volume. Brew on the canvas. That is the language of Inbox Gauge.