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Hi,BudDurland,<br />
How to configure the &quot;authenticated SMTP &quot;&nbsp;feature in postfix so that we can use it to send mail out??<br />
<br />
Thanks!
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Thanks a lot! I will study carefully on how to make the system work with smtp_auth.
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Sorry, anyone can help me in an easy to follow manner?<br />
It is so complicated for me to make the postfix work.<br />
<br />
Thanks for your kind help!
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<div class="content wysiwyg-content">
Dear Experts,<br />
Now, I am trying to setup my company email system with postfix/dovecot . <br />
Unfortunately, the system always complain as<br />
&quot;Relay denied&quot; when I try to use outlook express to send mail to 1372921435@qq.com.<br />
I have pasted the maillog and packet trace file here.<br />
Can you help me to figure it out??<br />
<br />
Note: For the packet trace, you just open it with wireshark(Change the extension from zip to pcap)<br />
<br />
Thanks!<br />
<a href="https://filedb.experts-exchange.com/incoming/2012/07_w27/586636/relay-denied-maillog.txt" target="_blank" class="file-inline" title="postfix maillog when I have the complain of relay denied (42 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>relay-denied-maillog.txt</a><br />
<a href="https://filedb.experts-exchange.com/incoming/2012/07_w27/586637/relay-denied-error.zip" target="_blank" class="file-inline" title="packet trace when I have the relay denied complain (1 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>relay-denied-error.zip</a>
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packet trace when I have the relay denied complain

relay-denied-error.zip

postfix maillog when I have the complain of relay denied

relay-denied-maillog.txt

Dear Experts,
Now, I am trying to setup my company email system with postfix/dovecot . 
Unfortunately, the system always complain as
"Relay denied" when I try to use outlook express to send mail to 1372921435@qq.com.
I have pasted the maillog and packet trace file here.
Can you help me to figure it out??

Note: For the packet trace, you just open it with wireshark(Change the extension from zip to pcap)

Thanks!

Why postfix reject outlook to send mail(always says relay denied)?

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

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