HubSpot Email Verification
Verify HubSpot contacts before your next campaign. Connect your HubSpot account, verify every email address, and push clean results back — all automatically.
HubSpot is a leading CRM and marketing automation platform used by over 200,000 businesses worldwide. Mailthentic integrates directly with HubSpot to help you verify and clean your contact database without CSV exports or manual work.
How It Works
Four steps to a clean HubSpot database.
Connect via OAuth
Securely link your HubSpot account with one click. No API keys to manage.
Import contacts
Select HubSpot lists or import all contacts. We handle deduplication automatically.
Verify every email
Each address runs through our 9-point verification engine including SMTP mailbox confirmation.
Push results back
Clean results sync back to HubSpot. Invalid contacts are tagged so you can exclude them from campaigns.
Why Verify Your HubSpot Contacts
Reduce campaign bounces
Verify every contact in your HubSpot lists before sending email campaigns. Remove invalid addresses automatically.
Protect sender reputation
High bounce rates from HubSpot campaigns damage your domain reputation. Clean lists prevent this.
Improve engagement metrics
Sending only to valid addresses increases open rates, click rates, and overall campaign ROI.
Automated workflows
Set up recurring verification to keep your HubSpot database clean as new contacts flow in.
Frequently Asked Questions
How does Mailthentic connect to HubSpot?
Mailthentic connects via secure OAuth — the same authorization method used by major platforms. You grant read/write access with one click, and we never store your HubSpot password.
Does verification send emails to my contacts?
No. Email verification never sends actual emails to the addresses being checked. It uses DNS lookups and SMTP protocol handshakes to confirm the mailbox exists without delivering any message. Your contacts won't know they've been verified.
How many credits does it cost?
One credit per email address verified. Duplicate contacts are automatically removed so you only pay once per unique address. Every new account gets 100 free credits. See pricing.
Clean your HubSpot contacts today
Start with 100 free verification credits. No credit card required.