To search for someone's email address for free, utilize a free email directory online, and input the person's first and last name into the search bar. Many social media sites display a person's email address if he has given the site permission to do so.
Many servers have an email directory, including email servers such as Yahoo, which only requires you to create a profile to access the directory. In order to search, the minimum information needed is the person's first and last name. However, if you are unsure of the name or spelling, enter what you do know, and comb through a list of possible results to find the right person. Some directories also provide additional information, such as age or location, that helps to narrow down the search. If there are too many names to search through, try narrowing down the search criteria if you know any additional information about the person.
When using a search engine, add as many personal details about the person as possible, such as location, age, employer, names of family members or college attended. If the search does not yield any results, remove some of the information until results are given. Review any sites with which the person is associated that appear in the results to try and find an email address.