Error: "Failed to send the test message. The operation timed out" (4225637)

Trying to send email from the Forest Recovery Console may result in the following error:

"Failed to send the test message. The operation timed out"

Ensure SMTP is work correctly and double check that the correct settings were entered in the FR console

1. Close the FR Console
2. Open regedit
3. Navigate to the following key:
   HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Quest\Recovery Manager for Active Directory\Options\Email
4. Create a new DWORD (32bit) named EmailSendTimeout
5. Set the value to set it to 100000 decimal
6. Try sending a test SMTP message again