Pop3 收信问题，高人帮我看看吧！万分感谢了

yangxm

我邮件服务器是exchange2000 ，大概有500多个邮件客户，一些用户在收比较大的邮件时，总是超时，客户端关闭了所有的杀毒软件和防火墙问题还是一样，我发送了一封9M的测试邮件，在接收时超时。
在客户端和服务器端用 windump 抓包，
服务器端最后的几个包看如下,帮满看看是什么原因啊
17:14:02.885548 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:125742}{127202:153317}{114062:119902}>
17:14:02.888170 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.891295 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.894044 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.897160 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.904660 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.905780 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.907776 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.908402 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.912046 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.913777 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.920027 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.921143 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.923767 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.924260 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.930394 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.931512 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.936634 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.937250 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:02.939005 IP 220.231.19.200.4190 > 172.18.0.2.110: . ack 87782 win 65535 <
nop,nop,sack 3 {119902:127202}{127202:153317}{111142:114062}>
17:14:03.568142 IP 172.18.0.2.110 > 220.231.19.200.4190: . 87782:89242(1460) ack
45 win 17476
17:14:04.628603 IP 220.231.19.200.4176 > 172.18.0.2.110: F 3525611818:3525611818
(0) ack 2902319770 win 65535
17:14:04.628663 IP 172.18.0.2.110 > 220.231.19.200.4176: R 2902319770:2902319770
(0) win 0
17:14:05.099256 IP 172.18.0.2.110 > 220.231.19.200.4190: . 87782:89242(1460) ack
45 win 17476
17:14:08.161305 IP 172.18.0.2.110 > 220.231.19.200.4190: . 87782:89242(1460) ack
45 win 17476
17:14:14.285523 IP 172.18.0.2.110 > 220.231.19.200.4190: . 87782:89242(1460) ack
45 win 17476
17:14:26.533970 IP 172.18.0.2.110 > 220.231.19.200.4190: . 87782:89242(1460) ack
45 win 17476
17:15:12.148038 IP 220.231.19.200.4190 > 172.18.0.2.110: F 45:45(0) ack 87782 wi
n 65535
17:15:12.148082 IP 172.18.0.2.110 > 220.231.19.200.4190: R 1852899175:1852899175
(0) win 0
17:15:13.120675 IP 220.231.19.200.4190 > 172.18.0.2.110: F 45:45(0) ack 87782 wi
n 65535
17:15:13.120751 IP 172.18.0.2.110 > 220.231.19.200.4190: R 1852899175:1852899175
(0) win 0
17:15:15.122395 IP 220.231.19.200.4190 > 172.18.0.2.110: F 45:45(0) ack 87782 wi
n 65535
17:15:15.122453 IP 172.18.0.2.110 > 220.231.19.200.4190: R 1852899175:1852899175
(0) win 0
17:15:19.126899 IP 220.231.19.200.4190 > 172.18.0.2.110: F 45:45(0) ack 87782 wi
n 65535
17:15:19.126947 IP 172.18.0.2.110 > 220.231.19.200.4190: R 1852899175:1852899175
(0) win 0
17:15:27.138715 IP 220.231.19.200.4190 > 172.18.0.2.110: F 45:45(0) ack 87782 wi
n 65535
17:15:27.138769 IP 172.18.0.2.110 > 220.231.19.200.4190: R 1852899175:1852899175
(0) win 0

iwill_mail

在服务器端，是否启用有关防病毒的软件。　检查服务器硬件配置。
在500多个邮件客户端时，附件最好不要超过５Ｍ。

atong999888

原帖由 iwill_mail 于 2006-12-6 17:52 发表
在服务器端，是否启用有关防病毒的软件。　检查服务器硬件配置。
在500多个邮件客户端时，附件最好不要超过５Ｍ。

在pop3客户端把超时时间加长一些, outlook express的缺省时间是1分钟.

如果客户端加长还不行, 请参考以下更改服务器的注册表

XCCC: POP3 Client Stops Responding (Hangs) or Times Out When You Try to Download Messages
适用于
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base: 256986 Description of the Microsoft Windows Registry

SYMPTOMSYou cannot download and receive e-mail messages by using Microsoft Outlook, Microsoft Outlook Express, or another POP3 client. The POP3 client may stop responding (hang) or time out when you try to retrieve your messages.
CAUSEThis issue may occur if one or more of the messages contain an incorrect POP3Tail, or termination sequence. As a result, the POP3 client does not detect the termination sequence in the "corrupted" messages and cannot complete the download of other messages to your Inbox.
RESOLUTIONTo work around this issue, set the CheckPop3Tail registry value to 1. To do so:

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

• Click Start, and then click Run.
• In the Open box, type regedit, and then click OK.
• Locate, and then click the following registry entry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\POP3Svc\Parameters\CheckPop3Tail
  Note If the CheckPop3Tail registry value is not present, create it. To do so:
  • Locate, and then click the following registry key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\POP3Svc\Parameters
  • On the Edit menu, point to New, and then click DWORD Value.
  • Type CheckPop3Tail, and then press ENTER.
• On the Edit menu, click Modify.
• In the Value data box, type 1, and then click OK.
• Quit Registry Editor.

Note: After you complete this procedure, Exchange 2000 Server checks the POP3Tail of each POP3 message, and adds the correct termination sequence (if it is missing). Because of this additional processing, you may experience a decrease in performance in environments where there are many POP3 users.

[ 本帖最后由 atong999888 于 2006-12-6 17:56 编辑 ]

iwill_mail

benet-panjian

学习啦！

yangxm

谢谢各位的回答，我去试一下看看。

圣绅士

我架设的服务器我没用POP3，客户直接用outlook2003收的，也有类似问题超过20M就会出现这些问题，改法一样么？？

超时已经加过还是不行的

liuzuen

这个其实与你的SERVER、网络性能有太大的关系。

钉子

如果在局域网使用Exchange Server 模试,20M会有问题确实和网络连接及服务器性能有关系了.不过我个人建议你限制一下单封邮件大小,当然,最好是做好用户培训,20M的附件不小的了.