I have a VPS for all of my websites, and really, I know just enough about how to run it to get by (in other words--I know just enough to be truly dangerous!). I've had separate installations of WordPress on each website until recently when I've been converting them over to a multi site installation on my main website. I have some questions about Domain Mapping and how it works in this case.
1) Website 1 is where WPMS is installed and I now have a dedicated IP for this site. Website 2 is on the same server (but not the same IP) as Website 1, and is still up and running independently. I'm currently importing databases from Website 2 into a network site on Website 1, but once everything is working properly, do I need to assign the A record for Website 2 to the dedicated IP address for Website 1 at the domain registrar or do I do that in WHM on my VPS?
2) What happens to the hosting account in WHM for Website 2 once the dns is resolving to the dedicated IP on Website 1? Do I just delete the files and terminate the account in WHM?
2) For some of my websites that will be migrated to the WPMS on the dedicated IP, I have email addresses like "firstname.lastname@example.org". Is it possible to still have these email addresses once Website2 is running in WPMS? If so, where do I manage those email addresses?
Thanks in advance for any advice or help!