Port 25 ok, but 465 or 587?

I want to use my smtp server on my site so: smtp.mydomain.com, and it works on port 25, but most of the emails are being sent to the junk email folder, and when I test port 465 or 597 on telnet it won't connect. Can I switch ports in ehcp? I'm on the newest build .15. Thanks!

Okay so I just checked and there is no security for my smtp server so anyone can use it. I looked around the forum here, and I didn't find any direct answers how to change that. Can someone point me in the right direction? I'm using the latest build of ehcp and I think I read somewhere that this had been fixed but it's not fixed for me.