Прочитайте текст и найдите соответствующий перевод подчеркнутого выражения
To use e-mail а client computer needs an e-mail program to connect to a network server. The program can be stand-alone, e.g. Outlook Express, or Web-based, e.g. Yahoo. Stand-alone programs let you compose e-mail offline, but with Web-based programs you must be online.
E-mail uses two kinds of mail servers: an SMTP server, which deals with outgoing e-mail and a POP3 server, which deals with incoming e-mail. SMTP stands for Simple Mail Transfer Protocol; POP stands for Post Office Protocol.