hosting plan for external domaines



I am considering using an email provider for my mail server, which is currently running on Zimbra. I need to know if it is possible to create multiple email addresses for each domain with this solution. The domains are currently hosted on Gandi with DNS managed on GCP.

Can I implement InMotion to have a web email interface similar to OVH? There are approximately 100 different domains on Zimbra, so the solution must support unlimited domains and unlimited email addresses. Additionally, can I have multiple different domains and email addresses ( -> [email protected] , -> [email protected] etc)

Thanks for any feedback