Hello,
I am wondering if it is possible to greylist email systems based on: 1. An error code (450 Helo Command Rejected: Host not Found). 2. If they are a 'org' domain. I don't want to reject these messages outright but an automatic greylisting based on the above for these domains is what we are looking for. We are finding that a lot of spam is being blocked based on not accepting 450'ed emails but we are blocking a sizable chunk of otherwise valid messages. Thank you for your time. Regards, Christopher Kurtis Koeber
