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Verify your HubSpot audience before you send

HubSpot is a CRM first, and every contact you import usually counts toward your billable contact total whether it ever opens an email or not. Running a segment through Bounceless before you import it, or before a marketing send, catches invalid and disposable addresses while they are still rows in a CSV — before they become billable contacts or bounce complaints against your sending domain.

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How it works

[01]Export your HubSpot segment to CSVIn HubSpot, go to CRM > Contacts, open the segment (or any saved or filtered view, including All Contacts), click Export in the upper right, choose CSV as the file format, and click Export. HubSpot emails you a download link that stays active for 30 days.
[02]Upload the CSV to BouncelessIn the Bounceless dashboard, start a new bulk verification job and upload the exported CSV. Every contact address gets a confidence level, reason codes, and a Pre-Send Decision.
[03]Download the verified resultsWhen the job finishes, download the results file. Addresses are grouped by Pre-Send Decision — send, review, or suppress — so you can separate contacts worth keeping active from ones to remove.
[04]Re-import the clean contacts and suppress the restUse HubSpot Quick Import (Data Management > Data Integration > Import data > Quick import) to update send-decision contacts, and separately import the suppress-decision addresses as a List of contacts to opt out of emails so HubSpot marks them Unsubscribed from all email.

Steps are sourced from HubSpot's official documentation (reference) and have not yet been walked on a live HubSpot account by a Bounceless team member — treat exact menu labels as indicative until this note is removed.

When to run it

Cleaning a segment before a campaign sendExport the segment, verify it with Bounceless, and remove or suppress the invalid rows before the next marketing send instead of waiting for HubSpot to flag bounces and suspensions after the fact.
Vetting a new list before it becomes billable contactsBefore running Quick Import on a trade-show scan, a partner export, or any new list, verify it with Bounceless first and only import the addresses that pass, since most imported contacts count toward your billable total regardless of engagement.
Re-verifying an aging segmentFor a segment with no recent opens, export it, verify it with Bounceless, and feed the confirmed-invalid rows into HubSpot's opt-out import so they stop receiving marketing email cleanly.

Common questions

Does this workflow require connecting Bounceless to my HubSpot account?

No. The workflow is CSV-based: export a segment from HubSpot, verify it in Bounceless, then re-import the clean contacts and suppress the rest. Your HubSpot login and API credentials stay out of the loop entirely, and the flow works the same way regardless of which HubSpot tier you are on, since contact export and import are both standard features.

Will suppressing invalid contacts lower my billable HubSpot contact count?

Not automatically. Importing addresses as a "List of contacts to opt out of emails" sets them to Unsubscribed from all email, which stops marketing sends, but those contacts still exist in your account and still count toward the billable total. If you also want the contact count to drop, you need to delete the records outright, for example through HubSpot's hard-bounce delete segment, rather than relying on opt-out alone.

Is a HubSpot "list" the same thing as a "segment"?

Yes. HubSpot renamed Lists to Segments in its interface, though URL paths and some documentation still use the older "lists" wording. On screen you will see labels like "CRM > Segments" and "Create segment." We use "segment" as the primary term in this guide since that is what the current HubSpot UI shows, with "list" as the term you may still encounter in help articles or in your own habits.

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