If you have to or want to change the domain of your WordPress MU site. The domain name is actually stored in different places in the database, as well as online in wp-config.php. Every instance of these will need to be changed.
Before you do anything create a backup. Go to phpMyAdmin, select your database, and choose Export. Save it to your computer. We’ll be making a copy of this and working on the copy. This way, if anything goes wrong, we still have our backup.
These are special resource records for mail routing. An MX (Mail eXchanger) record specifies a domain name and an associated computer, the “mail exchange”, which is able to deliver e-mail to an e-mail address with this domain name.
A Sample MX record that you can register with 1&1 looks like this:
Domain Name MX1: mail.domain.com Priority: 10 IP Address 192.168.1.1
Domain Name MX2: backup.domain.com Priority: 20 IP Address 192.168.1.2
Domain Name MX1: mail.otherdomain.com Priority: 30 IP Address 220.127.116.11 Continue reading…