Hello,
Does anyone know a software called UnityMail? Our company uses UnityMail 5.1 to send out about 500,000 permission-based newsletter. In the past few months we have encountered that the messages would be accepted by the ISP servers (Yahoo/AOL/Hotmail) but never got delivered to the individual mailboxes, thus our open rate is a lot lower than last year. We also found out that somehow we got blacklisted, though we are not sure where. The reason is that UnityMail server (with its own SMTP engine but also needs MS IIS to be installed) is not RFC compliant as it does not allow sending from <> or authentication is not set to anonymous on IIS SMTP. If we opened it, UnityMail ends up “replying” to the bounce messages, which we do not want.
My question is, is there a way to find out how our IP/domain got on the blacklist servers, and which servers are we on? Also, if anyone out there uses UnityMail 5.1, could you shed some lights as how we can make it RFC compliant without the server replying to bounce messages?
Thanks in advance for the help.
Scotch
