Cannot receive email in Mail App

Might be a port issue? I thought Id try out the mail app so I could send invites to Nextcloud and RocketChat. I can send the emails (its really slow) but I can’t seem to receive any emails back in my testing im using address. I also tired replying to one of the emails I sent.

Curiosity, is port 25 open thru your router?

Yes, port 25 is required for receiving the mail.
More info: Mail · syncloud/platform Wiki · GitHub

Ok, thank you! ill give that a shot and look over the document!

I’ve created the mapping but incoming still seems to be blocked. I tried to run this (nc -vz 25) via SSH but it doesn’t like the command. Ill call my ISP to see if they are blocking the port as well.