Bulk email is the act of sending one email campaign to a large group at once. Marketing messages, newsletters, updates, coupons, and invitations typically comprise bulk emails.

Sending thousands or tens of thousands of messages to even just a couple of email addresses would be draining due to the amount of time and effort required. Moreover, the cost of running such a campaign would not be sustainable for any business. Using a bulk email service is cheaper, faster, and much more convenient.