Well, with custom domain email addresses this is always true regardless of service provider.
If you ever abandon the domain, someone else could come along and buy the domain and create the same email address. They could then receive any mail intended for that email address (e.g. password resets). This is why I consider any domains purchased for email purposes to be lifetime investments.
If you ever abandon the domain, someone else could come along and buy the domain and create the same email address. They could then receive any mail intended for that email address (e.g. password resets). This is why I consider any domains purchased for email purposes to be lifetime investments.