I love Hey (https://hey.com) for its "screener" feature. It supports custom domains but not Gmail migration.
The screener keeps new senders out of your inbox. A rich set of keyboard shortcuts helps triage new senders into one of a few categories including simply blocking them. You can choose to block at the address or the domain level.
The screener keeps new senders out of your inbox. A rich set of keyboard shortcuts helps triage new senders into one of a few categories including simply blocking them. You can choose to block at the address or the domain level.