Hello Zero. I have explored the email server software exhaustively but the first thing you really need to make sure is that port 25 is not blocked by your ISP. If it is you are just doomed. I have yet to find a way around this, and because I use a Comcast consumer connection (their businesses options do not offer anything that remotely comes close to meeting my needs) I have since abandoned exploring this. I would start by determining if port 25 is even open for you first. You can use a tool like Can You See Me to determine if it is or not, but of course make sure something inside your network is listening on port 25 and that it isn’t blocked by your own router/firewalls.

As for my SSL certificate I use ZeroSSL. You can either do everything manually through their web browser interface or you can set up scripts. I just load the generated certificates into Apache on a WAMP setup I use. I have a background in computer networking, and electronics repair. I’m not terribly good at programming or scripting myself. I don’t have any background with C or any assembly languages for any processors, so you might be better off asking someone else for help with those.

Thank you for your feedback, too! I’m not a super frequent poster (if you check the dates you can tell) but it is nice to see a response from an actual person instead of just a bot.

(ALSO, I see you got your SSL certificates working–what did you use to set that up? I’m looking over some C code written to do that, but it’s been a while for me–are you into C (or x86_64 asm or RISC asm)?)