Sending mail via Exchange, why am I being flagged as spam?
- by Dan
Exchange 2007 uses direct DNS for all outgoing mail.
Mail that is sent from our public IP (1.2.3.4 - this is the IP of my mailserver) is delivered to the spam folders for providers such as Comcast and yahoo.
Currently, our SPF looks like this:
v=spf1 ip4:1.2.3.4 mx a:mail.domain.com ?all
MX: mail.domain.com.(10)
The reverse DNS entry on our ISP is mail.domain.com for our IP
The banner HELO response from our server is <220 mail.domain.com
Our IP address is NOT blacklisted anywhere, and the Cisco Senderbase gives us a score of Good
What is the reason our mail doesn't look legit?