As far as I can see, your email is not blocked or black listed. In fact if it were, you wouldn't end up with email in peoples junk folders. It wouldn't arrive at all.
If you have an alternative email address, send a message to that containing only the subject test and the message test and then check to see where it ends up. On receipt, check the message source code and see if anywhere in the header section, it's been marked as spam and by who. If it arrives normally, then do the same using a typical messages known to have been a problem, using the same procedure. You're looking for the difference to identify where the problem is.
There are some issues with the way you have your company email setup, which could result in some servers rejecting email. While it's not mandatory, RFC 822, RFC 1123 and RFC 2821 standards require email servers to accept email from [email protected] and [email protected] If I were you, I'd set up both those email addresses and forward them to your normal address. That's a perfectly acceptable way of overcoming that issue.
Email can be a complex problem to resolve, but you need to find out why it's being marked as junk (spam).