支持pop3/smtp/imap4等邮件收发协议的功能丰富的邮件开发库。-pop3/smtp/imap4 support such agreements mail feature-rich mail libraries.

base64解码源代码，由C语言组成，不依赖于任何库，支持GB2312

非常好的标准c++网络通讯开源库，支持tcp,udp，ssl,支持smtp和pop3邮件协议,Very good standard c++ network communication open-source database, to support tcp, udp, ssl, support for pop3 and smtp e-mail agreement