表达问题：Mail is sent and received directly using SMTP.

[pengsir]

安装postfix的时候，出现：
Mail is sent and received directly using SMTP.
SMTP是邮件传递协议，只能发送，不能接收吧，接收邮件的协议是 pop3或者 imap.

Mail is sent and received directly using SMTP.
应当修改成

Mail is sent directly using SMTP.
我的理解对吗？