Originally Posted by erosbk
Thanks, but I am not blacklisted in any place. The problem is that my mails are marked by google as spam, this was not happening before this user activity. I want to know where can I check my rep with google, or where can I send a form giving advise that the situation has been stoped.
Pretty sure you're blacklisted somewhere
Be sure you're entering the right IP or FQDN from your mail server.
You'll need to do as falko has posted.