[IMail Forum] What is "active validation"

[Jeff Pereira]

Hi -   Can someone please tell what "active validation" is or refers to in the below line:   10:25 15:33 SMTPD(5523017900860d04) [00000192] <UPDATENYC.COM> VALIDATION: (HELO) pv-server-04.pinnacleven.com domain failed active validation   Thank you.   Jeff