EMAIL服务器接收邮件的原理是怎么样的?(200分)

L

lwaif

Unregistered / Unconfirmed
GUEST, unregistred user!
我做了个监听25端口的程序,当有服务器发邮件过来时就发250 OK回去,为什么有些邮件能收到有些象21CN.COM的就收不到?下面是那程序记录的日志

Wed Sep 06 16:38:36 2006
.324 HELO 21cn.com

Wed Sep 06 16:39:37 2006
324
数据接受错误 2
Wed Sep 06 16:52:04 2006
.336 HELO 21cn.com

Wed Sep 06 16:52:15 2006
.Wed Sep 06 16:52:54 2006
344
数据接受错误 2
Wed Sep 06 16:53:20 2006
336
数据接受错误 2
Wed Sep 06 16:57:35 2006
.Wed Sep 06 16:58:15 2006
324
数据接受错误 2
Wed Sep 06 17:02:50 2006
.336 HELO 21cn.com

Wed Sep 06 17:03:52 2006
336
数据接受错误 2
Wed Sep 06 17:13:24 2006
.324 HELO 21cn.com

Wed Sep 06 17:14:42 2006
324
数据接受错误 2
Wed Sep 06 17:23:51 2006
.336 HELO 21cn.com

Wed Sep 06 17:24:54 2006
336
数据接受错误 2
Wed Sep 06 17:28:05 2006
.Wed Sep 06 17:28:45 2006
.364 HELO 21cn.com

Wed Sep 06 17:42:28 2006
364
数据接受错误 2
Wed Sep 06 17:43:39 2006
336
数据接受错误 2
Wed Sep 06 17:44:07 2006
356
数据接受错误 2
Wed Sep 06 20:28:38 2006
.Wed Sep 06 20:29:17 2006
344
数据接受错误 2
Wed Sep 06 20:33:19 2006
.356 HELO gdayce.com

Wed Sep 06 20:33:20 2006
356 MAIL FROM:

356 RCPT TO:

356 DATA

Wed Sep 06 20:33:21 2006
356 Recieved: from (HELO hzo) [202.97.101.49] by amnboi SMTP id tvpauk; Wed Sep 06 21:33:56 2006

356 From:
To:
Reply-To:
Subject: BC_*.*.*.*
Date: Wed Sep 06 21:33:56 2006
MIME-Version: 1.0
Content-type: multipart/alternative; boundary="--pnxtoibxjbiwmx"
X-Priority: 1

----pnxtoibxjbiwmx
Content-type: text/html

hello

----pnxtoibxjbiwmx--
.

Wed Sep 06 20:33:31 2006
356
数据接受错误 2
Wed Sep 06 20:50:27 2006
.344
数据接受错误 2
Wed Sep 06 22:11:05 2006
.356 HELO *.*.*.*

356 MAIL FROM:

356 RCPT TO:

356
数据接受错误 2
Wed Sep 06 22:46:30 2006
.344 HELO aizfac.com

344 MAIL FROM:

344 RCPT TO:

344 DATA

344 Recieved: from (HELO luj) [200.84.111.85] by mgshym SMTP id tudvsr; Wed Sep 06 23:46:49 2006

344 From:
To:
Reply-To:
Subject: BC_*.*.*.*
Date: Wed Sep 06 23:46:49 2006
MIME-Version: 1.0
Content-type: multipart/alternative; boundary="--mdjpcwrfofvwvz"
X-Priority: 1

----mdjpcwrfofvwvz
Content-type: text/html

hello

----mdjpcwrfofvwvz--
.

Wed Sep 06 22:46:40 2006
344
数据接受错误 2
Thu Sep 07 08:04:57 2006
.356
356
数据接受错误 2
Thu Sep 07 08:06:54 2006
.344 HELO *.*.*.*

344
数据接受错误 2
 
服务器设置不同,邮件服务器也不同,还可能是防火墙的原因。
 
不懂.听课ing
 

Similar threads

S
回复
0
查看
3K
SUNSTONE的Delphi笔记
S
S
回复
0
查看
2K
SUNSTONE的Delphi笔记
S
I
回复
0
查看
737
import
I
S
回复
0
查看
823
SUNSTONE的Delphi笔记
S
顶部