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Iptables + Squid
Name: Christiano Date: March 26, 2004 at 06:00:52 Pacific OS: Windows XP CPU/Ram: Athlon XP 2.0 / 512 DDR
Comment:
Hi, my name is Christiano. I've configured iptables and squid with some basic rules, just to get a simple firewall. It was working properly, until I receive this error message from Outlook Express: " The message could not be sent because it's destination was rejected by the server. Protocol: SMTP, Server error: '550.5.7.1 <email adress>... Relaying denied. IP name possibly forged [firewall IP adress]', Port: 25, Safe port(SSL). Error number: 550. " Please, help me. Thanks in advance.
Name: 3Dave Date: March 26, 2004 at 09:23:34 Pacific
Reply:
That looks more like a problem with your mail server (sendmail, qmail, postfix etc)...
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Response Number 2
Name: anonproxy Date: March 26, 2004 at 11:11:53 Pacific
Reply:
Or your email client configuration. In Outlook, try checking for mail before you send any. Under Tools|Options|Send is a checkbox which reads something like "send messages immediately". Uncheck that box. It's a practice of some email servers to require clients to check email before sending, to verify that you using the account as more than a relay.
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Response Number 3
Name: Christiano Date: April 1, 2004 at 08:28:55 Pacific
Reply:
-3Dave, it's not a problem with my mail server (Sendmail). That's I know for sure. I appreciated you help; more suggestions are welcome.
-anonproxy, I've unchecked that box in Outlook and the problem continued. Thank you. Any suggestions are more than welcome.
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Response Number 4
Name: anonproxy Date: April 1, 2004 at 11:30:25 Pacific
Reply:
Aside from configuration digging, I can only suggest trying a different email client, attemting to telnet to the mail server, and checking the server logs.
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