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Email can receive but not send
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Original Message
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Name: jackypkh
Date: January 7, 2004 at 21:00:45 Pacific
Subject: Email can receive but not send
OS: Red Hat 9
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Comment: After using the RedHat Linux 9 as a gateway (Firewall), the local user can not send email but able to receive email with Outlook.
The error status is something as follow:
The message could not be sent because it rejected you as the sender. Server Response: '550 5.7.1 Access denied'.(Account: 'mail.xxxx.com', SMTP Server: 'mail.xxxx.com', Error Number: 0x800ccc78). I can use Webmail to send and receive mail.
If I am using the external IP, I can do it right. Even I use other SMTP, POP3 in the internal network, it works. Do anyone can help to solve this problem??? Here is my analysis,
Basically, I can sure that
1) it did not related to client setting ( it is because I am able to use the client to receive mail, even send email using other SMTP, POP3) 2) the user account have sufficient premission to do so. (the user can do it at home.) 3) I think it may be the firewall problem. Because my company use other hardware firewall before, but we just choose to use the Red Hat 9 Firewall in last day Thank You !
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Response Number 1
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Name: jackypkh
Date: January 7, 2004 at 22:33:26 Pacific
Subject: Email can receive but not send
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Reply: (edit)In addition, I really do not understand
why other SMTP, POP3 in the internal LAN can be worked well.
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Response Number 2
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Name: 3Dave
Date: January 9, 2004 at 02:32:41 Pacific
Subject: Email can receive but not send |
Reply: (edit)Do you have to be connected by a specific ISP in order to connect to their mail server? Is the user dialling up via a different ISP when they try from home?
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Response Number 3
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Name: rick
Date: January 9, 2004 at 10:14:28 Pacific
Subject: Email can receive but not send |
Reply: (edit)sounds like you are using the wrong smtp server, each isp will only allow it's own customers, (ie' ip addresses), to send mail through it's servers. check with your isp to find out what smtp server you should be using.
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Response Number 4
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Name: jackypkh
Date: January 12, 2004 at 22:35:45 Pacific
Subject: Email can receive but not send
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Reply: (edit)I don't think it is the problem of ISP. It is because
1) I am always able to do so if i use the external IP.
2) My ISP have given my company the right to do so. The only thing I hope to do is using internal IP through the Web Server(2 NICs one for external IP, one for internal IP) to send email. The only different is the webserver have the RH9 firewall. However, I can use some other email server to send email in internal IP. In addition, I think my company email server using non-standard port (not port 25,I guess) Question 1) Would anyone here mind to tell me how can I check which port is my email server using?
the email server is sendmail in RH7.1 Question 2) I hope to use other email application in my RH9 webserver so that Web & Email can use in the same machine. Any good Email application will yours suggest? Deep Thank You
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Response Number 5
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Name: 3Dave
Date: January 13, 2004 at 01:32:22 Pacific
Subject: Email can receive but not send |
Reply: (edit)1) You could ue either nmap or netstat to can your ports.
$ nmap 127.0.0.1
$ netstat -a | less 2) sendmail, qmail, postfix....
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Response Number 6
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Name: jackypkh
Date: January 14, 2004 at 00:14:57 Pacific
Subject: Email can receive but not send
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Reply: (edit)thank you 3Dave
I issued this command, however, I find that there is no nmap command would you mind to tell me what this command do and suggest another command to me? thanks
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Response Number 7
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Name: 3Dave
Date: January 14, 2004 at 06:34:38 Pacific
Subject: Email can receive but not send |
Reply: (edit)You can probably find nmap on the redhat installation CDs. It's a portscanner. "netstat -a" should work though...it lists all ports that your computer is listening on.
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Response Number 8
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Name: jackypkh
Date: January 19, 2004 at 22:36:52 Pacific
Subject: Email can receive but not send
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Reply: (edit)the port 25 on the email server is ok
well.....
really don't know how to solve it......
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Response Number 9
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Name: 3Dave
Date: January 21, 2004 at 01:03:18 Pacific
Subject: Email can receive but not send |
Reply: (edit)You should be able to telnet to port 25 and send an email by hand. Rather than writing it all out here, check this site for how:
http://www.activexperts.com/activemail/telnet/
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