HTTP Error 404.3 (WCF Services) when running on Windows 8

Go to Program and features
Check the feature .NET Framework 4.5 Advanced Services > WCF Services > HTTP Activation

IIS SMTP Service 5.5.2 rejected: need fully qualified

5.5.2 rejected: need fully qualified hostname” tends to be destination server specific and relates to the server name that the mail is sent from which is different from the email from name. Most mail servers will reject mail from a name that they cannot lookup in DNS as an anti-spam measure.

Open “Internet Information Services (IIS) 6.0 Manager” on the server.

Expand and then right click on “[SMTP Virtual Server #1]” and select “Properties” 

Select the “Delivery” Tab and then “Advanced”

Enter DNS (which you send mail from) “ex: company.com” in the “fully-qualified domain name” field.

Debug ASP.NET applications on Windows 8 and Visual Studio 2012

To debug IIS applications in Windows 8 and Visual Studio 2012, you should launch Visual Studio with Administrator privileges.

In Windows 8, you have to right-click devenv.exe and select "Troubleshoot compatibility".

1. select "Troubleshoot program"
2. check "The program requires additional permissions"
3. click "Next", click "Test the program..."
4. wait for the program to launch
5. click "Next"
6. select "Yes, save these settings for this program"
7. click "Close"

Note: When using VS in admin mode, you will not be able to drag & drop files into the VS IDE !