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PTR Problem with static IP?

Hello, I have several static IP addresses from comcast. The one that I am having an issue with is (removed for account security). Comcast has previously created a PTR record for this address that resolves to bitbrothers.com. I host the A record for bitbrothers.com and it resolves to (removed for ac

Craig, I just ran into this same problem. I am using Linux as the OS and Sendmail as the SMTP/Mailer. The issue is that your server OS is running dual stack IP; IPv4 and IPv6. Sometime within the past several months Comcast added IPv6 MX records fo

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