The desk
A practice with one tray.
MCAINBOX exists because MCA mail is a different problem than ordinary B2B outreach. We do not run software for every vertical. We fold letters for funding shops.
The shop already has a list — or can get one. What it rarely has is a sending system that still works in month six. Tools built for quiet B2B files burn on merchant cash advance. The complaint rate is higher, the filters learn faster, and a shared warmup pool is a short lease.
So the product is a desk: dedicated sending names, volume split across many inboxes, copy written per brand and varied per recipient, an apply tray the shop owns, and a report that counts completed files.
We will not invent a founder myth or a borrowed billion. If you want to know whether this works for your file, send the qualify note and ask for a current shop we can introduce.
Ready to send
Bring the list. We will fold the letters and fly them in.
Placement to Gmail and Google Workspace is seed-tested. If it drops below 90% after you are at full speed, those days are credited.