If we want to test this we can use a simple Mail client.

要想对此进行测试，使用简单的邮件客户端即可。

youdao

STMP (Simple Mail Transfer Protocol) is the Internet protocol used to send mail to a server.

STMP（简单邮件传输协议）是用于将将邮件发送到服务器的因特网协议。

youdao

Simple mail list multiple user registered version, database programming source code, a good reference.

说明：简易通讯录多用户注册版，数据库编程源码，很好的参考资料。

youdao

Professor Prusinkiewicz is on sabbatical leave in Australia, but he sent us an e-mail suggesting a simple way to understand the process.

VOA: special.2009.10.13

If you need a personal computer for writing and simple electronic mail, even a used PC with a 486 processor will be fine.

CNN: Tips for the PC Buyer

But for now the company is practicing what it preaches and focusing on the most important task on its to do list: create a great, simple mobile e-mail app.

CNN: New iPhone app vows to fix e-mail clutter

The protocols used to encode and transfer e-mail messages are simple and are not owned by anyone.

ECONOMIST: Monitor