The campaign starts as soon as you create it; it has no send time of its own. While it runs you can pause, resume or cancel it. Each person gets a separate copy sent through your mailbox.
Tracking works only after your company’s owner or an administrator has switched it on, and even then only for recipients with a recorded consent; the others get an ordinary copy without tracking. Within that, you can switch opens and links off for the whole campaign. Keep the list to people who expect your email, and remove addresses that bounce; HawkOpen skips addresses that bounced hard, opted out of your company’s messages (also in the CRM) or whose owner asked for their data to be erased.
Limits: up to 50 recipients per campaign on Free and 500 on Pro and Business; on Business also 60,000 a month, counted by the calendar month in the time zone of your settings (UTC if none is set). Your mail provider’s own sending limits also apply.