SMTP not working on GoDaddy VPS

Patrick Thomas
Patrick Thomas used Ask the Experts™
We have been struggling with setting up our website on a GoDaddy Virtual Private Server. Please Help!

We have a .net program that connects to First Data to process credit cards. It running on a Windows 2012R2 + Plesk Virtual Private Server hosted at GoDaddy.We need to send confirmation emails from the server after a transaction is processed. I am attempting to send an SMTP email on a GoDaddy Plesk VPS and am having difficulty with the syntax.  Here are examples of what has been tried with the corresponding error messages.

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I presume that you are using some 3rd party code to send the email directly. I would suggest that you used
the Microsoft IIS SMTP server as a smarthost as the logs might be simpler to understand.
Can you please use "" for this and let me know if it's still not working.

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