这种对数据的编码方式使邮件传输代理不可能修改结果八位元。
It encodes the data in such a way that the mail transport agent is unlikely to modify the resulting octets.
电子邮件通过邮件传输代理、邮件发送代理及邮件用户代理发送。
E-mail is sent via mail transfer agents, mail delivery agents, and mail user agents.
一个邮件传输代理，比如Sendmail 8.7或者更高的版本。
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。
The mail transfer agent receives the messages from another mail transfer agent, a mail user agent, or a mail submission agent.
邮件传输代理也叫邮件服务器，是用来把邮件从一台计算机发送到另一台计算机的软件。
The mail transfer agent is also known as the mail server and is simply software that sends E-mail from one computer to another.
邮件交换器记录由诸如sendmail和postfix等邮件传输代理在查找电子邮件发送目的地时使用。
The mail exchanger records are used by mail transport agents like sendmail and postfix when looking up where to send E-mail.
例如，如果您正在对一个邮件用户代理程序或邮件传输代理程序进行打包，那么有些特定的考虑事项适用于这种情形。
For example, if you're packaging a mail user agent or mail transport agent, there are some specific considerations that apply.
所有的电子邮件都通过邮件传输代理(mailtransfer agent,MTA)来传输，Sendmail则是最流行的MTA，所以这个警告影响了世界范围内的很多组织。
All electronic mail is transferred using a mail transfer agent (MTA), and Sendmail is the most popular MTA, so this warning affected many organizations worldwide.
显然，应该由MUA(邮件用户代理，mail user agents)、过滤器或者MTA(邮件传输代理，mail transport agents)来做这件事情，而不是要求用户手工完成。
Obviously, MUAs (mail user agents), filters, or MTAs (mail transport agents) should do this work rather than requiring users to do it manually.
显然，应该由MUA(邮件用户代理，mail user agents)、过滤器或者MTA(邮件传输代理，mail transport agents)来做这件事情，而不是要求用户手工完成。
Obviously, MUAs (mail user agents), filters, or MTAs (mail transport agents) should do this work rather than requiring users to do it manually.
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