急，新配exchange2010邮件服务器发邮件显示两个ip

zhang_hua

Received: from sino7.sin.com (unknown [222.66.57.16])        by newmx77.qq.com (NewMx) with SMTP id         for <23030617@qq.com>; Tue, 28 Oct 2014 11:36:36 +0800X-QQ-FEAT: jJU3LNdEwPLYzdq7V/vo1qyL9M4bb1zeX-QQ-MAILINFO: NL3WKUOj1eeIgxybM3lXbB+uFUJ5q1Xgn1UNEp8sJfOAbLRU3Aioxw8i3        8VorTB0QdmmCbk7wT+6X-QQ-SSF: 000100000000000001F000020000001X-QQ-mid: mx77t1414467396thi1j6jz2Received: from sino7.sin.com ([fe80::bceb:8860:f14a:ec55]) by sino7.sin.com ([fe80::bceb:8860:f14a:ec55%11]) with mapi id 14.01.0218.012; Tue, 28 Oct 2014 11:36:35 +0800From: test <test@sin.com>Received: from SK (172.18.18.251) by sino7.sin.com (172.18.18.207)
with Microsoft SMTP Server (TLS) id 14.1.218.12; Mon, 17 Nov 这是什么问题

钉子

哪两个IP？一般是客户端IP和服务器IP