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Manually quarantine contacts from receiving marketing emails
Last updated: September 3, 2025
Available with any of the following subscriptions, except where noted:
To remediate an email suspension, blocklisting event, or trust and safety violation, HubSpot may require you to opt out or quarantine certain contacts. Quarantining a contact will exclude it from receiving marketing emails, but it will remain eligible for use in Sales email tools.
To ensure you can still enroll these contacts in a sequence, send them a one-to-one email, or use them in other tools within HubSpot, you can edit the value of a contact's Email address quarantine reason property on their contact record or update a segment of contacts in bulk.
If one of the contacts you manually quarantined replies to a one-to-one email, sequence email, or submits a form, their quarantined status will be removed and they'll be eligible to receive marketing emails again.
Quarantine an individual contact
To manually quarantine a single contact:
- In your HubSpot account, navigate to CRM > Contacts.
 - Click the contact's name.
 - In the left panel, under the About this contact section, click View all properties.
 - Under All properties, enter Email address quarantine reason in the search box.
 - Hover over the Email address quarantine reason property, then click the edit icon.
 - In the dropdown menu, select a reason.
 - In the bottom left, click Save.
 
Quarantine contacts in bulk
To quarantine contacts in bulk:
- In your HubSpot account, navigate to CRM > Segments.
 - Click the name of a segment.
 - Select the checkbox to the left of the Name column to select all contacts.
 - Click Edit.
 - In the dialog box, click the Property to update dropdown menu. Search for and select Email address quarantine reason.
 - Click the Email address quarantine reason dropdown menu and select a reason.
 - Click Update.
 
Quarantine a contact via a workflow
Users in Professional or Enterprise accounts can set the property value for Email address quarantine reason with a workflow. Learn more about how to set a property value in a workflow.
