How to Clean a Hunter.io Export Before It Goes Into a Sequence

Export the leads from Hunter, drop invalid rows and generic inboxes, split accept-all and unknown addresses into their own file, then check the remaining list live on the day you load it into the sequencer. Hunter's verification status does most of the sorting for you; the confidence score is for ranking the accept-all group, not for passing or failing the whole file.

The Hunter export to email list tool does the sorting in your browser. The steps below explain what it's doing and why, so you can do it by hand in a spreadsheet if you prefer.

Step 1: Get the file out of Hunter

There are two common sources:

• Leads: open Leads, pick the list, select the leads and choose Export > CSV.
• Bulk Email Finder or Bulk Domain Search: download the results file when the job finishes. Hunter's Bulk Email Finder article says the file keeps your original columns and adds Email, Score (a deliverability indicator in %) and Verification status, plus position, LinkedIn URL, phone and company when available. You can download all emails found, or only those verified as valid.

If you only want the safest rows, the "valid only" download is the quick path. You'll lose the accept-all rows, which are often a real share of B2B lists on Microsoft 365 and gateway-filtered domains. Our Hunter export steps page has the same steps with screenshots of where each button sits.

Step 2: Read the verification status

Hunter's verification FAQ (read 3 November 2026) defines four statuses:

Status	Hunter's wording	What to do with it
Valid	"confirmed as safe to send"	Keep. Check again if the file is more than a few weeks old
Invalid	"doesn't exist or rejects mail"	Remove
Accept-all	"the domain accepts all emails, so results can vary"	Separate file, ranked by score
Unknown	"the server didn't respond or blocked verification"	Separate file; a re-check often resolves it

Unknown and accept-all aren't the same thing. Unknown means the check didn't finish: the server timed out, greylisted, or refused. A second check a day later often gets an answer. Accept-all means the check finished and the server said yes to everything, so a second check gets the same answer. Our post on accept-all vs unknown results explains the difference in more detail.

Step 3: Use the score where it helps

The confidence score is most useful inside the accept-all group. Hunter's FAQ says to "prioritize sending to addresses scoring above 85%" for accept-all emails. It doesn't give a threshold for unknown.

So sort the accept-all file by score, and decide how far down you'll go. A common split is to send the top band in a small, slow campaign, watch the bounces for a few days, and stop if they climb. Our guide to catch-all leads in sequences covers how to size that campaign.

Step 4: Remove generic inboxes

Hunter's Type column marks generic addresses such as info@, sales@ and contact@. For cold outreach to a person, those are shared inboxes: reply rates are low, someone else reads them, and complaints come from them. Set them aside unless the offer is genuinely for the company inbox. The role-based email filter catches the ones Hunter didn't label.

Step 5: Merge repeats and look for mismatches

Bulk files often contain the same person twice, from two searches or two spellings of the company. Merge them so nobody gets two first touches. While you're there, look for rows where the email's domain differs from the company domain. That's often a parent company, an old domain after a rebrand, or a guess, and it's worth checking first.

Step 6: Check the clean file live

A Hunter verification is true on the day it ran. If the search was three weeks ago, some of those people have changed jobs and their inboxes have closed. Upload the cleaned file at /verify: each address gets a live mailbox check, valid, risky and invalid download as separate files, and catch-all domains are marked. Then:

1. Load only the valid file into your main campaign.
2. Put accept-all leads in a separate, slower campaign, or drop them.
3. Re-check unknowns after a day; move the ones that resolve.

Our post on re-verifying leads older than 30 days explains why the date of the last check matters more than the vendor's label.

What this won't fix

• Accept-all domains stay unproven. No checker can confirm a mailbox on a server that says yes to everything; the honest answer is "risky".
• A found email isn't permission. A list from an email finder is cold. Follow the rules where your recipients are; the cleaning steps don't make it compliant.
• Hunter doesn't publish its export column names. The tool finds Verification status, Score and Type by name; check the notes above the result if your file looks different.

If you're comparing Hunter with other finders on what a usable address costs, see Hunter.io alternatives and Hunter vs ZeroBounce for verification.

Where SimpleVerifier fits

The cleaning tool is free and runs in your browser. The live check is the paid part: the first 100 checks are free with a Google sign-in on the verify page. Pro is $39 a month with the first 100,000 checks a month at full speed, then slower, never cut off, and one-time packs of 10,000 checks for $15 never expire. See pricing.