You can delete an inbox from your inbox settings. Deleting an inbox will permanently remove it from your account along with any connected channels, chat targeted messages, and threads. These threads will no longer be accessible in the inbox, though the conversations will still be logged to the associated contact or ticket's record. Deleting an inbox can't be undone.
In your HubSpot account, click the settingssettings icon in the main navigation bar.
In the left sidebar menu, navigate to Inbox > Inboxes.
Click the Current view dropdown menu and select the inbox you want to delete.
Next to the inbox name, click the Actions dropdown menu and select Delete inbox.
In the dialog box, type in the name of your inbox to confirm this action, then click Yes, delete.
Thank you for your feedback, it means a lot to us.