Updating Custom Nameservers with MX Records

[ctrlaltdel21]

Our client has a domain with custom nameservers pointing to another hosting company that's not us. We have migrated the site to our cPanel.

The client uses RackSpace mail. I retrieved the MX records from MXToolbox and added them to our client's cPanel on our server. I also went into WHM and updated the nameservers for this cPanel account to our name servers. The site is ready to be pointed to the cPanel on our server.

When I go into their domain registrar and update the custom nameservers to our nameservers, will there by any downtime with the website and the email? I just updated all the records above about an hour ago.....should I wait 24 hours to update the custom nameservers at the Domain Registrar?

Thank you.

 

[cPRex]

Hey there! If things are currently working as is, and the new records on your cPanel machine are also setup correctly, I wouldn't expect there to be any propagation time, as both machines will work no matter which nameserver record a user gets.

 

[ctrlaltdel21]

Hey there! If things are currently working as is, and the new records on your cPanel machine are also setup correctly, I wouldn't expect there to be any propagation time, as both machines will work no matter which nameserver record a user gets.

I thought that would be the case, but I wanted some reassurance. Thank you - it worked!

 

[cPRex]

Glad to hear that went well!