Below is just my opinion try it of follow it at our own risk, I have just started using cwp in he past 10 days and this is what i have learned
I think you are referring to the MYHOSTNAME and DOMAIN NAME, I don't think you will need to change it here, These settings are already available in "Server Settings-->Change HOSTNAME" Whatever you put here is what $MYHOSTNAME will pick up.
NOTE : 2-3 days back When I went to "Server Settings-->Change HOSTNAME" There were 2 options
CHANGE HOSTNAME
DOMAIN NAME
But now its only showing HOSTNAME (Maybe my vps updated cwp, No idea, My vps guys are not at all supportive
)
It still doesn't matter cause If your hostname is "server1.yourdomain.com" then your domain name will/should be "yourdomain.com"
Also you can change the hostname to whatever you wish(Atleast that is what I think)
Example : My website name is
www.ahmhao.com So i have kept my hostname as "server.ahmhao.com" and domain name as "ahmhao.com"
prior to that it was set to hostname as "server.rajanxsingh.com" and domain name as "rajanxsingh.com" by my vps provider which I changed to above that is "server.ahmhao.com" and "ahmhao.com" respectively.
So NO DON'T MAKE CHANGES HERE. Make changes at "Server Settings-->Change HOSTNAME" (My opinion)
Also, Let me know if your mails are working fine and going to inbox, cause mine are going to spam, and i need help with that if you can help me.
Regards
Rajan Singh