为什么ehlo后面跟的不是邮件服务器名字啊

hua70616

[121.37.36.229] EHLO river
20110113 172544 127.0.0.1       SMTPD (00000884) Authenticated river_huang@axwdragon.com, session treated as local.
20110113 172544 127.0.0.1       SMTPD (01310142) [121.37.36.229] MAIL FROM: <river_huang@axwdragon.com>
20110113 172544 127.0.0.1       SMTPD (01310142) [121.37.36.229] RCPT TO: <harris.davicom@gmail.com>
20110113 172544 127.0.0.1       SMTPD (01310142) [121.37.36.229] RCPT TO: <sw_hsu@axwdragon.com>
20110113 172544 127.0.0.1       SMTPD (01310142) [121.37.36.229] h:\imail\spool\Da61801310142b422.SMD 183214
20110113 172544 127.0.0.1       SMTP (1B880037) processing h:\imail\spool\Qa61801310142b422.SMD
20110113 172544 127.0.0.1       SMTP (1B880037) ldeliver axwdragon.com sw_hsu-main (1) river_huang@axwdragon.com 183214
20110113 172544 127.0.0.1       SMTP (1B880037) Trying gmail.com (0)
20110113 172544 127.0.0.1       SMTP (1B880037) Connect gmail.com [74.125.155.27:25] (1)
20110113 172545 127.0.0.1       SMTP (1B880037) 220 mx.google.com ESMTP p32si13580605ybk.25
20110113 172545 127.0.0.1       SMTP (1B880037) >EHLO axwdragon.com
20110113 172546 127.0.0.1       SMTP (1B880037) 250-mx.google.com at your service, [220.231.128.104]
20110113 172546 127.0.0.1       SMTP (1B880037) 250-SIZE 35651584
20110113 172546 127.0.0.1       SMTP (1B880037) 250-8BITMIME
20110113 172546 127.0.0.1       SMTP (1B880037) 250-STARTTLS
20110113 172546 127.0.0.1       SMTP (1B880037) 250 ENHANCEDSTATUSCODES
20110113 172546 127.0.0.1       SMTP (1B880037) >MAIL FROM:<river_huang@axwdragon.com>
20110113 172547 127.0.0.1       SMTP (1B880037) 250 2.1.0 OK p32si13580605ybk.25
20110113 172547 127.0.0.1       SMTP (1B880037) >RCPT To:<harris.davicom@gmail.com>
20110113 172547 127.0.0.1       SMTP (1B880037) 250 2.1.5 OK p32si13580605ybk.25
20110113 172547 127.0.0.1       SMTP (1B880037) >DATA
20110113 172548 127.0.0.1       SMTP (1B880037) 354  Go ahead p32si13580605ybk.25
20110113 172603 127.0.0.1       SMTP (1B880037) >.
20110113 172606 127.0.0.1       SMTP (1B880037) 552-5.7.0 Our system detected an illegal attachment on your message. Please
20110113 172606 127.0.0.1       SMTP (1B880037) 552-5.7.0 visit http://mail.google.com/support/bin/answer.py?answer=6590 to
20110113 172606 127.0.0.1       SMTP (1B880037) 552 5.7.0 review our attachment guidelines. p32si13580605ybk.25
20110113 172606 127.0.0.1       SMTP (1B880037) ERR undeliverable 552 5.7.0 review our attachment guidelines. p32si13580605ybk.25
20110113 172606 127.0.0.1       SMTP (1B880037) SMTP_DELIV_FAILED
20110113 172606 127.0.0.1       SMTP (1B880037) >QUIT

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EHLO river

river是发件人的电脑主机名字
这让我百思不得其解

lgj858

这正常啊
你得先由你的发件人的电脑发送到邮件服务器
然后smtpd这才是由邮件服务器外发的信息