Actually your personal email is higher stake than your corp email because you want privacy, security and you are on your own and take full responsibility. $5/m

Actually your personal email is higher stake than your corp email because you want privacy, security and you are on your own and take full responsibility. $5/month VPS is fine; mine has uptime > 1 year. Even if you have bad IP that is constantly blocked, you can cheat and use sendgrid to send mails. It is free for 100 mails per day. The most important thing is now you own all your data.