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發表時間：2004/8/5 4:23 |
- Webmaster
- 註冊日: 2008/2/19
- 來自:
- 發表數: 15771
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- [分享]SendMail 問題 mail loops back to me 處理法
- "mail loops back to me (MX problem?) Local configuration error"
This is a very common problem covered in the Sendmail FAQ:
http://www.sendmail.org/faq/section4.html#4.5
If you receive these errors in Sendmail, class w--the list of hostnames for which the local computer will accept mail--may not be configured correctly.
Example error:
----- The following addresses had permanent fatal errors -----
<root@host.server.com>
(reason: system config error)
----- Transcript of session follows -----
553 5.3.5 host.server.com. config error: mail loops back to me (MX problem?)
554 5.3.5 <root@host.server.com>... Local configuration error
Solution (Sendmail version 8.11 and greater):
1. Add host.server.com to /etc/mail/local-host-names
2. Send the Sendmail daemon a SIGHUP signal (ex. kill -HUP `head -1 /var/run/sendmail.pid`)
Solution (Sendmail versions before 8.11; I would recommend upgrading to a later version of Sendmail):
1. Add host.server.com to /etc/mail/sendmail.cw
2. Send the Sendmail daemon a SIGHUP signal (ex. kill -HUP `head -1 /var/run/sendmail.pid`)
These solutions assume you are using the use_cw_file feature in Sendmail, and that you are using default locations for the files containing additional class w addresses. Check your sendmail.mc or sendmail.cf files to determine if you are using this feature and the locations of the files.
You can display class w entries with the following command:
echo '$=w' | sendmail -bt -d0.4
By default, class w contains localhost, the IP address 127.0.0.1, and the system's IP address(es), fully qualified domain names, and short hostnames. Entries placed in /etc/mail/local-host-names or /etc/mail/sendmail.cw are added to these default values.
Last modified: 03/06/2003
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冷日
(冷日) |
發表時間：2005/2/16 17:21 |
- Webmaster
- 註冊日: 2008/2/19
- 來自:
- 發表數: 15771
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- [分享]POP3問題 - Connection closed by foreign host.
- POP-3現在都是各式小企鵝的預設元件,
基本上她們被放在 /usr/sbin/ipop3d !
所以POP3是否有安裝好,或是你要直接在CONSOL收信的話,
你是可以直接執行:
[code:1:2c1f7947fe]# /usr/sbin/ipop3d
+OK POP3 mail.avfocus.com.tw v2000.70 server ready
USER username
+OK User name accepted, password please
PASS password
+OK Mailbox open, 0 messages
LIST
+OK Mailbox scan listing follows
.
QUIT
+OK Sayonara[/code:1:2c1f7947fe]
那,如果POP3明明已經安裝好了,再來就是希望要遠端收信啦!
此時你可以透過 telnet 來測試你的遠端 POP3 狀況!
[code:1:2c1f7947fe]# telnet localhost 110
Trying 127.0.0.1...
Connected to mail.avfocus.com.tw.
Escape character is '^]'.
+OK POP3 mail.avfocus.com.tw v2000.70 server ready
USER username
+OK User name accepted, password please
PASS password
+OK Mailbox open, 0 messages
LIST
+OK Mailbox scan listing follows
.
QUIT
+OK Sayonara
Connection closed by foreign host.[/code:1:2c1f7947fe]
若這樣也OK了,則可以試試看使用你對外IP看看!
[code:1:2c1f7947fe]# telnet mail.avfocus.com.tw 110[/code:1:2c1f7947fe]
如果這樣也OK了,那你應該就可以放心的在各種收信軟體裡設定你的帳號與密碼了!
但是,有時候事情就不是那麼順利!
明明pop3就有安裝好!
在機器上也可以透過 telnet localhost 110 來達到收信的效果!
但是你的收信軟體 EX:OUTLOOK . NETSCAPE 等等就是告訴你收件踰時!
此時請先檢查 telnet [對外IP] 100 這樣是否會運作!
若是不會,則請使用 nmap -p 1-65535 [對外IP] 來試試看你的機器對外到底開了哪一些PORT!
如果110明明有開啟,但就是無法TELNET進去,得到像 "Connection closed by foreign host." 這樣的訊息的話!
請去檢查你 /etc 資料夾下的 hosts.allow 與 hosts.deny 這兩隻檔案!
現在的小企鵝預設都是把所有的先擋掉,再透過ALLOW來開放!
所以如果你的 hosts.allow 檔裡面啥都沒有,或是都被MARK掉了!
請加入這兩行
[code:1:2c1f7947fe]ipop3d : ALL
popper : ALL[/code:1:2c1f7947fe]
表示開放這兩種服務可以從任何IP連結進來!
然後此時要重新啟動你的 NETWORK 與 XINETD 的服務
[code:1:2c1f7947fe]/etc/rc.d/init.d/network restart
/etc/rc.d/init.d/xinetd restart[/code:1:2c1f7947fe]
如此你的POP3收信應該就沒有任何困擾了啦!!!
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