attachment pdf documents no longer go to the CC person (signed and unsigned)

when the email from the person signing document.  I can view the attached document on the reply to account but the person in the Carbon Copy CC of the email is not getting that same pdf attachment.   Thursday 12/8 and prior the attachments always happened correctly.   Starting Friday 12/9/2016 the attachments stopped.   The account set up did not change.  The attach a PDF is checked and always has been.