(For the record, I am running my own mail server, but I'm not currently accepting applications for new accounts. I will be sad when I want to grow past 25 user

(For the record, I am running my own mail server, but I'm not currently accepting applications for new accounts. I will be sad when I want to grow past 25 users if it means I need to start paying $5/mo for each of them, because I never learned to scale on my own.)