Trueinbox
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Deliverability calibration

See which inboxes are real.

Trueinbox separates valid, risky, and invalid addresses from lists you own or have consent to process — then seals the clean export.

Start 14-day trialEnter the optics lab
No harvested addressesCSV or single checksHonest unknowns

Optical alignment

Aligned in three passes.

SUBMIT

Drop in your list or verify one address by one address.

SEPARATE

Valid, risky, and invalid, sorted with catch-all signals kept visible.

SEND CLEAN

Export only what passes, with the consent trail still yours.

Calibration samples

Calibration sheets.

Calibration sheet for Mara V.
Mara V.18,420 contacts aligned before a product launch.
Calibration sheet for Noah K.
Noah K.7,800 risky rows separated from the send.
Calibration sheet for Elif A.
Elif A.42 domains checked for MX, SPF, and DMARC signals.
Calibration sheet for Jonas P.
Jonas P.96,000 records calibrated across two teams.
Calibration sheet for Priya S.
Priya S.12,350 exports cleaned before CRM import.

“The point is not to make every address look valid. The point is to know which ones deserve the send.”

Trueinbox optics lab

Pricing signal

Misaligned?

Choose a calibration certificate and bring the list back into register.

From $19.00/month →

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