SBC Global Blocking


I have some forwarding setup for people with email addresses. It appears DH is getting blocked by them now as well?! Can someone please confirm? Here is the error…

Diagnostic-Code: X-Postfix; host[] said: 553
5.3.0 flpi100,DNSBL:To request removal of,, send the
complete error message in an E-mail to (in reply
to MAIL FROM command)


I was able to send an E-mail to someone as recently as 5/9. All the same you should put in a support request with the full E-mail headers. They’ll best be able to help you get this resolved.

–Matttail - personal website

Odd. It seems to be working now. Thank you for your reply.