Invalid Header due to header filed: "Date"

[Damian]

> Is there a way for me to make an exception just for the date so I can
> use Scan to Email on a HP Color LaserJet MFP M477?

If this is about a missing Date: header, the most you can do is to
disable both From: and Date: checking via

> $allowed_header_tests{'missing'} = 0;