I have been trying to do domain mapping for a long time in vain. I went through all the steps one by one in the usage section.
There are 2 things not exactly the same in my setup.
1) I added define sunrise right under WP_DEBUG . However my WP_DEBUG is on the 81st line in contrast to 1st line in your screenshots.
2) I do not have "supporters only: yes" section in my configuration.
Besides these I suppose everything seems fine.
I created wordsdev.wordsglobal.com and mapped wordsdev.com to it. Now when I go to both I see this "default website page"
"If you feel you have reached this page in error, please contact the web site owner:
In Godaddy I added the following in A(Host ) records fo domain mapping and multi-domain:
Host Points to TTL
* 18.104.22.168 1 Hour
@ 22.214.171.124 1 Hour
Please let me know what I am doing wrong?