A domain or domain name is what comes between the @ in your email address and the .com, .org, .net, etc. (For example, yourname@domain.com.) Domains help your customers find and remember where your business is located on the internet. A subdomain is a portion of your domain—sales.domain.com or marketing.domain.com—that can be used to help increase deliverability of your email marketing.

Effective Email Marketing
Email marketing is quickly becoming one of the most popular forms of Internet advertising. This is because there are many distinct advantages to the concept