Change E-Mail Whitelabel Server

We are using a E-Mail Marketing Tool called Klick-Tipp (similar to Active Campaign). We also have Whitelabel E-Mail with this. Means the Marketing Tool will send automated email which make them look as it was sent by our normal email. This is where the whitelabel domain is shown in Klick-Tipp: [login to view URL] Now we have changed our domain, this we need someone to set up the new e-mail server again on our new hosting provider with our new domain name. In the past, we had to choose a subdomain for return path, another one for tracking urls and a third for mailserver host-name