电子邮件（英语：electronic mail，简称：email或e-mail），又称电子邮箱，简称电邮，是指一种由一寄件人将数字信息发送给一个人或多个人的信息交换方式，一般会通过互联网或其他电脑网络进行书写、发送和接收信件，目的是达成发信人和收信人之间的信息交互。一些早期的电子邮件需要寄件人和收件人同时在线，类似即时通信。现在的电子邮件系统以是保存与转发的模型为基础。邮件服务器接受、转发、送出及保存邮件。寄信人、收信人及他们的电脑都不用同时在线。寄信人和收信人只需在寄信或收信时简短的连接到邮件服务器即可。

Electronic mail is a method of exchanging digital messages between computer users; such messaging first entered substantial use in the 1960s and by the 1970s had taken the form now recognised as email. Email operates across computer networks, now primarily the Internet.