caiwu adds the @ symbol. According to the query of relevant public information, the naming symbols of each department of a large enterprise are the pinyin of the enterprise department plus its own serial number. The naming technique for corporate email prefixes is that short is better than long. A short and sophisticated corporate email user name can get twice the result with half the effort. E-mail is a program developed by Ray Tomlinson in 1971 after researching existing file transfer programs and information programs.