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Ipswitch 的解释:<br>
<a target=_blank href=http://support.ipswitch.com/kb/IM-19990624-DM05.htm>http://support.ipswitch.com/kb/IM-19990624-DM05.htm</a><br>
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Question/Problem: I get: <br>
550 unknown user my_name@my_domain.net<br>
but I know that the my_name user exists on my domain.<br>
<br>
Answer/Solution: Telnet to the IMail PC on port 25 (the SMTP port) from a machine other than the IMail PC.:<br>
<br>
telnet mail.my_domain.net 25<br>
<br>
See if IMail will accept mail using the email address that got the unknown or invalid user error:<br>
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220 mail.my_domain.net (IMail 8.05 1-1) NT-ESMTP Server X1<br>
>HELO<br>
250 hello mail.my_domain.net<br>
>MAIL FROM: <test@ipswitch.com><br>
250 ok<br>
>RCPT TO: <user@my_domain.net><br>
550 not local host my_domain.net, not a gateway<br>
<br>
In this case, the address in the form user@domain was not valid. Now, try the full hostname of the domain:<br>
<br>
>RCPT TO: <user@mail.my_domain.net><br>
250 ok its for <user@mail.my_domain.net><br>
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Your mail.my_domain.net domain needs my_domain.net as an Alias in the Virtual Hosts Configuration. (IMail Administrator | localhost | General | Add Host -- with Tools | Use Wizard not checked).<br>
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If this doesn't settle the problem, please make sure that you do not have any other Virtual Domain with my_domain.net in the Official Hostname or the Aliases field.<br>
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Also, check the NT hosts file c:\winnt\system32\drivers\etc\hosts to make<br>
sure that my_domain.net is not resolving to some other IP address.<br>
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