请问这是怎么回事，不是我的用户发的信啊，要怎么解决

starfifa

Wed, 22 Aug 2007 07:24:46 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:24:46 Smtp登录. IP: 193.238.99.242 , Port 3731
Wed, 22 Aug 2007 07:24:49 Smtp登录. IP: 193.238.99.242 , Port 3732
Wed, 22 Aug 2007 07:24:50 Smtp登录. IP: 193.238.99.242 , Port 3754
Wed, 22 Aug 2007 07:24:54 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:24:55 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:24:55 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:24:55 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:24:55 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:24:56 Smtp登录. IP: 193.238.99.242 , Port 3840
Wed, 22 Aug 2007 07:24:57 成功发送邮件到 [hofstra.edu]
Wed, 22 Aug 2007 07:24:58 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:25:00 Smtp登录. IP: 193.238.99.242 , Port 3877
Wed, 22 Aug 2007 07:25:02 成功发送邮件到 [hofstra.edu]
Wed, 22 Aug 2007 07:25:07 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:25:08 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:25:09 Smtp登录. IP: 193.238.99.242 , Port 3976
Wed, 22 Aug 2007 07:25:09 Smtp登录. IP: 193.238.99.242 , Port 3979
Wed, 22 Aug 2007 07:25:10 成功发送邮件到 [hofstra.edu]
Wed, 22 Aug 2007 07:25:10 成功发送邮件到 [hofstra.edu]
Wed, 22 Aug 2007 07:25:12 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:25:12 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:25:12 [193.238.99.242] 关闭连接.
Wed, 22 Aug 2007 07:25:15 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:25:16 Smtp登录. IP: 193.238.99.242 , Port 4085
Wed, 22 Aug 2007 07:25:17 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:25:17 成功发送邮件到 [hofstra.edu]
Wed, 22 Aug 2007 07:25:18 Smtp登录. IP: 193.238.99.242 , Port 4103
Wed, 22 Aug 2007 07:25:19 成功发送邮件到 [hofstra.edu]
Wed, 22 Aug 2007 07:25:23 [193.238.99.242] 关闭Smtp连接.
Wed, 22 Aug 2007 07:25:25 Smtp登录. IP: 193.238.99.242 , Port 4177
Wed, 22 Aug 2007 07:25:26 成功发送邮件到 [hofstra.edu]

coolglay

没开SMTP认证发信吧，邮局被人利用发垃圾邮件了。

starfifa

请问要在哪里开通SMTP认证发信

jetlu

我说：