To unsubscribe leads in bulk, you need to go to Leads section first, then click on the highlighted checkbox.
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After clicking the checkbox, leads on Page 1 will be selected. If you want to select all the leads stored in MailBluster, the click on Select all X leads where X is the total number of leads.
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After selecting all the leads, click on Bulk action.
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Then click on Unsubscribe.
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All the leads will then be set to Unsubscribed status.
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