linux下面的Base64编码源代码，用于多媒体邮件的发送，可以用于嵌入式设备上，已经经过实际产品测试-following Base64 encoded source code for multimedia mail sent, can be used for embedded devices, has been through actual product testing

在linux下编写的smtp转发邮件程序，能解码base64，利用smtp协议实现邮件的本地接受及发送到真正的服务器上。-smtp forwarding mail program that can decode base64, using the local smtp protocol messages received and sent to the real server.