I wrote earlier that I don't have any issues self-hosting my own mail server. But this is most likely an exception that. If your plan is to send out newsletter

I wrote earlier that I don't have any issues self-hosting my own mail server. But this is most likely an exception that. If your plan is to send out newsletters and other marketing content, you are really better off going through a company that specializes in that. Self-hosting email is really only practical for individuals hosting their own personal/family mail, or for small companies who have the resources to hire someone to manage the mail system for their own domain. The TL;DR here is, if you _look_ like a spammer (lots of identical/similar messages from one domain to lots of recipients), other mail systems will probably treat you like a spammer.