Mail solicitation refers to the act of sending unsolicited mail to potential clients or customers, typically in hopes of acquiring new business. However, there are many other terms that can be used interchangeably with mail solicitation. One such term is direct mail marketing, which refers to the same process of reaching out to potential clients via mail. Another synonym for mail solicitation is direct response marketing, which involves sending mail with the goal of prompting an immediate response from the recipient. Whether you call it mail solicitation, direct mail marketing, or direct response marketing, the goal is the same: to reach potential customers and grow your business.