To start this off, I'm just going to say I am a networking noob, I know the basics but not much, please be kind. Last night I set up a server with Hmailserver, squirrelmail, and wampserver. I can send emails to any address with no problem, and can receive them from other email addresses from my same server, however I cannot receive emails from gmail.com, or hotmail. I have tried googling this issue, and only really found people with MX issues, which is something I don't believe I have. I tried fiddling with SMTP settings, and tried setting up a route for the SMTP, but the documentation from the hmailserver website is a bit confusing, and I kept getting errors no matter what I did. Here are the diagnostics from hmailserver, and here is a link to the intodns of my domain. Thanks in advance!