I want to setup my custom subdomain with my posterous blog: tahirakram.posterous.com.
I am confused over setting up A record and CNAME.
Do I need to set A record and CNAME both to run my posterous to this URL: blog.tahirakram.com?
So far I set up CNAME Name: blog.tahirakram.com Value: posterous.com
Should I set A recrod name value too? (if yes, as following) Host Name: blog.tahirakram.com Destination IPv4 Address: 18.104.22.168
Instruction given by posterous