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Relaying denied. Proper authentication required. [message #1931] Mon, 05 May 2008 14:53 Go to previous message
maw
Messages: 2
Registered: May 2008
Junior Member
I am trying to setup NST on the same server as an Exchange server. I have configured the Incomming to be port 26 and the Output to be port 25 to my mail server.

I have yet to get NST to pick up an incomming email. My mail server receives e-mails fine as long as I leave the port forward in the Linksys router to port 25 to my mail server.

When I change the port forward to port 26 I get the following message when I send an e-mail from an external account to an internal account.

550 550 5.7.1 ... Relaying denied. Proper authentication required.

If I switch the port back to 25 the email goes through, but so does a ton of SPAM.

I have been trying to fix this all weekend. Any help would be great. Thanks.
 
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