Professional Business Email Sync

I have an email with my domain attached to it, (I am assuming it’s an IMAP type mail). However, Keap can not sync with it. I am told that only google and Microsoft mail is able to sync with the Keap app. Please Please Please have an update where we can use and sync our own company email. I LOVE the app and all of its features and it has made my life so much easier, but would really appreciate this update as I am used to using other email app providers (just for email, nothing more) and being able to sync with Keap app would be super beneficial! Thank you!!!