We currently run our website on a UNIX virtual private server and are using PHP and Mysql to send out our email blast once a week. The problem we are having is emails to our domain theedge1039.com bounce back to our server as well as messages to yahoo.com. We checked our IP on various blacklists 18.104.22.168 - and ave not found to be blacklisted. our php.ini file is set to
SMTP = localhost
smtp_port = 25
We also host another website on the same server - power983fm.com (22.214.171.124) and it does not have the same problem as our other domain. Let me know what information you may need to assist us with this problem and it is greatly appreciated.