How to turn on SMTP relaying? Getting error: "SMTP Error: The following recipients failed [address]"

Posted by Susan on Server Fault See other posts from Server Fault or by Susan
Published on 2009-07-22T05:40:44Z Indexed on 2010/04/07 11:03 UTC
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Attempting to configure some software on our server to send email via SMTP.

When testing it, get this SMTP Error: SMTP Error: The following recipients failed [address]"

Based on my research and a reply from the software's support team this error usually occurs because relaying is not allowed on the SMTP server from the IP address of the web server. The solution is to "Go to the configuration of your SMTP server and turn relaying on for your IP address"

My question is -- how do I do this? Is this done from WHM? cPanel?

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