Self Hosting your mail server, is it plausible?

Hello everyone, nice to meet you all.

This question was probably asked around here but is it really possible to be your own mail provider?

I think I'm experienced enough when it comes to homelabbing that I could take on something like this.

I THINK im aware of the technicalities, I did some research but it still begs the question, is it really worth it? would it be hard to build up a reputation so that your emails don't land in spam folders?