I have recently installed phpBB on a free host which have the mail() funtion disabled and does not provide a SMTP server.
My ISP's SMTP server only allows mails from within their network (as most do) and Gmail SMTP server requires TLS which phpBB does not support. Those are the two possible solutions I thought of but failed for me.
Well, I selected that host because they had a nice free service which included all I need, and because they have good prices for when I'm ready to pay (in a few months). Needed something that is free now and can grow with my business without the need to change host every few months.
SMTP is not available on the free plan, only the paid ones. Which I didn't realize until yesterday. So I was looking for a solution in the interim. In a few months, when I'm ready to pay, I will get that mail server included.