Inward and outward remittances are usually carried out by a mail transfer, D/D, or T/T. 

汇入和汇出通常通过信汇、即期汇票或电汇完成。

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The mail transfer agent receives the messages from another mail transfer agent, a mail user agent, or a mail submission agent.

邮件传输代理从另一个邮件传输代理、邮件用户代理或邮件提交代理处接收消息。

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A mail transfer agent such as Sendmail 8.7 or later.

一个邮件传输代理，比如Sendmail 8.7或者更高的版本。

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

ECONOMIST: Monitor

Postal services are being liberalised around the world as new services such as e-mail, fax and data transfer have begun to erode traditional markets.

ECONOMIST: Post Office: Pass the parcel | The

According to daily logs posted on NOAA's website, others followed the exploration remotely using e-mail, on-line chat rooms, video streams, and file transfer sites to exchange information.

CNN: STORY HIGHLIGHTS