Mail server Setup on Windows 2012 R2: cannot connect to your outgoing SMTP e-mail server

I have setup a Windows 2012R2 Cloud server at Rackspace.
I have installed the latest 64 bit version of Icewarp on the machine.
I have gone to and setup a A reference to the IP address of the server.
I have gone to the icewarp server and added a new account for
In the Cloud Server's firewall, I have added a rule for opening these ports:
Mail: smtp, http, pop3, imap 25,80,110,143
I probably don't need http.

I have gone to my local Outlook and added a new account for
I run the "test"
It errors with:
Outlook cannot connect to your outgoing SMTP e-mail server.
I have tried this test with the Windows Firewall on the cloud server turned off as well.

What am I missing?

Starr DuskkASP.NET VB.NET DeveloperAsked:
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Test it on the server itself first, if port 25 is used at all. I'm not an Icewarp user, but the support page says it could also use:
ports 366 or 587 or 465

Also sometimes a cloud server or ISP blocks traffic on port 25. In that case, try to use the ports I noted before (by configuring Icewarp to listen on those ports)
Starr DuskkASP.NET VB.NET DeveloperAuthor Commented:
I tried to telnet:
telnet.exe localhost 25

and with the firewall on or OFF, I get the same message:

could not open connection... on port 25.
Starr DuskkASP.NET VB.NET DeveloperAuthor Commented:
My problem was that under Services / SMTP / Properties,, I had All Services set to a specific IP address from my old server settings. (I imported the settings).


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Starr DuskkASP.NET VB.NET DeveloperAuthor Commented:
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