300分，请高手帮我设置好SMTP服务器，解决asp.net发送邮件问题

Question

我服务器安装了windows 2003 server SMTP 
自己用ASP.NET的mail类写了发送邮件程序。 但是smtp过一段时间就“假死”“无响应”“发送邮件失败” 重新启动SMTP服务器后就好了。但过一会还是发送邮件失败 不知道什么原因，是不是smtp设置问题？烦请各位指点! 谢谢！

Answer 1

以前是自己动手用Socket写的smtp，所以没有这个问题。

Answer 2

以前发邮件时门户网站会把我们的的服务器的IP发的邮件当垃圾邮件处理，造成发送失败，丢到重试队列中，但退邮件越来越多，服务也就DOWN了。

Answer 3

还有一个现象：
我停止“默认SMTP虚拟服务器”时，总是死在那里，无响应。

Answer 4

你可以试着加一个认证用户，然后通过认证用户来发的试试看！---
但是smtp过一段时间就“假死”“无响应”“发送邮件失败”重新启动SMTP服务器后就好了。但过一会还是发送邮件失败不知道什么原因，是不是smtp设置问题？烦请各位指点! 
---可能不是设置问题了，如果是你在本地内网发的话，很容易被别的邮件服务器给Blocked掉，这样发出去就很正常了。如果是在正式的服务器上面的话，你可以检查一下你的病毒软件，防火墙之类的设置！

Answer 5

Active Connections  Proto  Local Address          Foreign Address        State           PID
  TCP    0.0.0.0:25             0.0.0.0:0              LISTENING       1204
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       4
  TCP    0.0.0.0:110            0.0.0.0:0              LISTENING       1660
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING       676
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING       4
  TCP    0.0.0.0:1025           0.0.0.0:0              LISTENING       1204
  TCP    0.0.0.0:1026           0.0.0.0:0              LISTENING       1204
  TCP    0.0.0.0:1027           0.0.0.0:0              LISTENING       1204
  TCP    0.0.0.0:1131           0.0.0.0:0              LISTENING       432
  TCP    0.0.0.0:1433           0.0.0.0:0              LISTENING       1228
  TCP    0.0.0.0:3690           0.0.0.0:0              LISTENING       1496
  TCP    0.0.0.0:4899           0.0.0.0:0              LISTENING       1316
  TCP    0.0.0.0:9876           0.0.0.0:0              LISTENING       2384
  TCP    127.0.0.1:1225         0.0.0.0:0              LISTENING       2528
  TCP    127.0.0.1:1434         0.0.0.0:0              LISTENING       1228
  TCP    192.168.18.2:139       0.0.0.0:0              LISTENING       4
  TCP    222.73.27.146:1080     210.59.197.93:25       TIME_WAIT       0
  TCP    222.73.27.146:1119     207.155.252.45:25      ESTABLISHED     1204
  TCP    222.73.27.146:1142     210.59.198.11:25       TIME_WAIT       0
  TCP    222.73.27.146:1153     220.229.238.22:25      SYN_SENT        1204
  TCP    222.73.27.146:1154     218.83.175.154:25      SYN_SENT        1204
  TCP    222.73.27.146:1156     168.95.6.101:25        SYN_SENT        1204
  TCP    222.73.27.146:1157     168.95.6.118:25        SYN_SENT        1204
  TCP    222.73.27.146:1158     168.95.6.136:25        SYN_SENT        1204
  TCP    222.73.27.146:1183     210.59.196.218:25      TIME_WAIT       0
  TCP    222.73.27.146:1185     218.83.175.154:25      SYN_SENT        1204
  TCP    222.73.27.146:1187     218.83.175.154:25      SYN_SENT        1204
  TCP    222.73.27.146:1188     218.83.175.154:25      SYN_SENT        1204
  TCP    222.73.27.146:1191     218.83.175.154:25      SYN_SENT        1204
  TCP    222.73.27.146:1202     68.142.202.247:25      SYN_SENT        1204
  TCP    222.73.27.146:1216     218.83.175.154:25      SYN_SENT        1204
  TCP    222.73.27.146:1230     209.191.88.247:25      SYN_SENT        1204
  TCP    222.73.27.146:1234     65.54.244.8:25         ESTABLISHED     1204
  TCP    222.73.27.146:1235     65.54.244.168:25       ESTABLISHED     1204
  TCP    222.73.27.146:1236     65.54.244.8:25         ESTABLISHED     1204
  TCP    222.73.27.146:1237     216.39.53.2:25         ESTABLISHED     1204
  TCP    222.73.27.146:1287     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1288     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1289     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1290     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1291     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1292     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1293     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1294     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1295     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1297     61.164.33.187:52188    ESTABLISHED     2676
  TCP    222.73.27.146:1433     222.73.27.146:3930     ESTABLISHED     1228
  TCP    222.73.27.146:1433     222.73.27.146:3933     ESTABLISHED     1228
  TCP    222.73.27.146:1433     222.73.27.146:3934     ESTABLISHED     1228
  TCP    222.73.27.146:1433     222.73.27.146:4612     ESTABLISHED     1228
  TCP    222.73.27.146:1810     216.39.53.1:25         ESTABLISHED     1204
  TCP    222.73.27.146:3189     66.36.236.47:25        ESTABLISHED     1204
  TCP    222.73.27.146:3216     61.151.239.48:25       ESTABLISHED     1204
  TCP    222.73.27.146:3524     216.39.53.3:25         ESTABLISHED     1204
  TCP    222.73.27.146:3555     216.39.53.3:25         ESTABLISHED     1204
  TCP    222.73.27.146:3690     218.77.195.174:15425   ESTABLISHED     1496
  TCP    222.73.27.146:3690     218.77.195.174:16860   ESTABLISHED     1496
  TCP    222.73.27.146:3690     218.106.121.10:52309   TIME_WAIT       0
  TCP    222.73.27.146:3930     222.73.27.146:1433     ESTABLISHED     4004
  TCP    222.73.27.146:3933     222.73.27.146:1433     ESTABLISHED     4004
  TCP    222.73.27.146:3934     222.73.27.146:1433     ESTABLISHED     4004
  TCP    222.73.27.146:4458     206.190.53.191:25      ESTABLISHED     1204
  TCP    222.73.27.146:4522     68.142.202.247:25      ESTABLISHED     1204
  TCP    222.73.27.146:4612     222.73.27.146:1433     ESTABLISHED     3372
  TCP    222.73.27.146:4626     68.142.202.247:25      ESTABLISHED     1204
  TCP    222.73.27.146:4649     207.155.249.201:25     TIME_WAIT       0
  TCP    222.73.27.146:4667     209.85.143.114:25      TIME_WAIT       0
  TCP    222.73.27.146:4668     210.59.197.93:25       TIME_WAIT       0
  TCP    222.73.27.146:4682     209.85.143.27:25       TIME_WAIT       0
  TCP    222.73.27.146:4687     216.239.59.27:25       TIME_WAIT       0
  TCP    222.73.27.146:4696     68.142.202.247:25      ESTABLISHED     1204
  TCP    222.73.27.146:4697     66.196.97.250:25       ESTABLISHED     1204
  TCP    222.73.27.146:4704     64.233.185.27:25       TIME_WAIT       0
  TCP    222.73.27.146:4705     64.233.185.114:25      TIME_WAIT       0
  TCP    222.73.27.146:4726     211.20.188.150:25      TIME_WAIT       0
  TCP    222.73.27.146:4728     210.209.13.129:25      TIME_WAIT       0
  TCP    222.73.27.146:4729     210.59.198.11:25       TIME_WAIT       0
  TCP    222.73.27.146:4730     210.242.11.85:25       TIME_WAIT       0
  TCP    222.73.27.146:4731     210.242.10.122:25      TIME_WAIT       0
  TCP    222.73.27.146:4732     210.242.10.52:25       TIME_WAIT       0
  TCP    222.73.27.146:4733     211.75.72.111:25       TIME_WAIT       0
  TCP    222.73.27.146:4734     210.59.199.8:25        TIME_WAIT       0
  TCP    222.73.27.146:4737     210.59.196.218:25      TIME_WAIT       0
  TCP    222.73.27.146:4769     209.85.135.27:25       TIME_WAIT       0
  TCP    222.73.27.146:4791     68.142.202.247:25      ESTABLISHED     1204
  TCP    222.73.27.146:4792     64.233.167.27:25       TIME_WAIT       0
  TCP    222.73.27.146:4899     59.55.234.162:6122     ESTABLISHED     1316
  TCP    222.73.27.146:4938     122.116.94.51:25       TIME_WAIT       0
  TCP    222.73.27.146:4981     66.249.93.27:25        TIME_WAIT       0
  TCP    222.73.27.146:4994     207.155.249.213:25     TIME_WAIT       0
  TCP    222.73.27.146:4999     66.249.83.27:25        TIME_WAIT       0
看看日志是否有帮助

Answer 6

web.config里 设置
<system.net>
    <mailSettings>
      <smtp from="[email protected]">
        <network host="smtp.163.com" password="你的密码" userName="你的邮箱" defaultCredentials="false"/>
      </smtp>
    </mailSettings>
  </system.net>cs里用mailMessage类写邮件,用SMtpClient类发送~~~
                    MailMessage email = new MailMessage();
                    email.To.Add(mail);
                    email.From = "寄信人"
                    email.Subject = "主题";
                    email.Body = "内容"
                    SmtpClient clintObj = new SmtpClient();
                    clintObj.Send(email);

Answer 7

似乎已经搞定！大家可以测试看看：http://www.svnhost.cn/welcome.aspx

Answer 8

http://www.svnhost.cn/这是你的那个项目吧，做得不错哦

Answer 9

邮件服务器因邮件原因卡。我想很可能是服务器保存过多代发的邮件副本（好像在c盘哪个位置.em什么格式）。由于一直尝试smtp服务进行发送。才可能造成IIS过分的假死状态吧。

Answer 10

windows自带的玩意儿有几个好使的,lz不如试试IMail

Answer 11

SMTP 25端口一般容易占用。 SMTP应该不难配置。也没有几个参数。 你完全可以直接用 邮件服务器的代替他的工作。例如：winwebmail 
他或许能帮你大忙。当然，你可以直接去 baidu/google 找  “邮件服务器 下载”

Answer 12

我用的那个WinMail. 有次被攻击, 造成队列目录中的几十万个文件, 一动那个目录服务器就假死...... 最后没办法了, 格盘, 然后屏蔽攻击的那个IP, 再加上那个什么RBL还是叫什么的验证. 现在好了.