Whats the best/cheapest email service to hook into? - Lemmy.World

Im tried of giving my data to google for all my email needs. Preferably I would like to use the thunderbird client. I also have a number of self hosted services. I used to run my own email server, but ATT no longer allows the ports open and I want to move away from self hosting that solution. Figured I would ask people what they use here, since Im assuming others are in a similar situation. Any suggestions?