Upload a CSV. Walk away with verified, scored leads.
Drop in a CSV and Sendbox maps the fields, checks every email address (sorting each into deliverable, undeliverable, risky, or unknown), assigns a confidence score, and flags catch-all domains along the way. Bad addresses never make it into a campaign.
CSV Import
Data & Leads
Drop in the file
Drag and drop or browse for your CSV, Sendbox reads the columns and suggests how they should map.
- Fields map themselves
- Verification on import
- Confidence scores
- Catch-all detection
A look inside the Sendbox dashboard, where CSV Import lives.
Leads
Email | Email Status | First Name | Last Name | Company | Job Title | Tags | |
|---|---|---|---|---|---|---|---|
elena.vasquez@webflow.com | Verified | Elena | Vasquez | Webflow | VP of Product | SaaSDecision Maker | |
derek.osei@ramp.com | Verified | Derek | Osei | Ramp | Head of Growth | Prospect | |
naomi.fischer@retool.com | Risky | Naomi | Fischer | Retool | Engineering Lead | SaaS | |
carlos.mendez@amplitude.com | Verified | Carlos | Mendez | Amplitude | Director of Marketing | SaaSWarm Lead | |
grace.lin@framer.com | Verified | Grace | Lin | Framer | CTO | Decision Maker | |
hello@driftbase.dev | Invalid | Owen | Baptiste | DriftBase | Founder | Startup | |
mia.chen@retool.com | Verified | Mia | Chen | Retool | VP Engineering | SaaS | |
priya.raman@zapier.com | Not checked | Priya | Raman | Zapier | Revenue Operations | RevOps | |
nina.brooks@brex.com | Verified | Nina | Brooks | Brex | Sr. Account Executive | SaaSWarm Lead | |
kevin.oyelaran@superhuman.com | Verified | Kevin | Oyelaran | Superhuman | VP of Partnerships | Decision Maker | |
rachel.novak@intercom.com | Risky | Rachel | Novak | Intercom | Head of Sales | SaaS | |
ben.castillo@calendly.com | Verified | Ben | Castillo | Calendly | Director of Growth | Prospect | |
sophie.laurent@ramp.com | Verified | Sophie | Laurent | Ramp | Head of RevOps | SaaS | |
dylan.foster@attio.com | Risky | Dylan | Foster | Attio | Founder | Startup |
Clean lists in, no cleanup after
Fields map themselves
Upload a CSV and watch columns map to the right fields automatically, fix anything that needs it.
Verification on import
Every address gets checked, deliverable, undeliverable, risky, or unknown, so bad emails never reach a campaign.
Confidence scores
Every email gets a confidence score, so risky or unknown addresses come with a real basis for the call you make.
Catch-all detection
Catch-all domains get flagged during import, since they accept every address but don't guarantee delivery.
Step 1
Drop in the file
Drag and drop or browse for your CSV, Sendbox reads the columns and suggests how they should map.
Step 2
Check the mapping
Common fields like email, first name, and company map themselves automatically; adjust anything that's off.
Step 3
Verify, then import
Every email gets checked on the way in, sorted into deliverable, undeliverable, risky, or unknown, with a confidence score attached and catch-all domains flagged.
Where it fits
Lists from an event
Grabbed a lead list at a conference? Upload it and let verification catch the bad addresses before they hit a campaign.
Lists bought from a data provider
Bought a list somewhere else? Import it and Sendbox flags the undeliverable and risky addresses before you send anything.
Cleaning up an existing list
Run any list through verification. Catch-all detection and confidence scores help you decide which leads are actually worth emailing.
Verification handled for you, not left to manual review
Verification with a confidence score, not a guess
Most tools let you upload a CSV and hope for the best. Sendbox checks every address on import, deliverable, undeliverable, risky, or unknown, attaches a confidence score to each one, and flags catch-all domains so you decide how to treat them instead of finding out after a bounce.
- Beats Smartlead
- Beats Lemlist
Four verification tiers, each with a confidence score
Every imported email lands in one of four categories, deliverable, undeliverable, risky, or unknown, each with a confidence score attached.
- Catch-all domains get flagged separately, since they'll accept any address without guaranteeing delivery.
Every email is checked and sorted into deliverable, undeliverable, risky, or unknown, each with a confidence score, and catch-all domains get flagged separately.
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