Also known as an ESP (Email Service Provider) or email marketing service, email marketing software lets you send and manage email marketing campaigns. Typically, it also lets you manage email lists, email design elements, and analyze campaign performance.
Email marketing software is specially designed to deliver marketing emails to a large number of recipients. Unlike free email providers like Gmail and Outlook which are only intended for one-to-one sending. If you try to send an email campaign with Gmail, there’s a high chance it’ll end up in the spam folder.