When you try to send files to Secure Mail from QuickEdit or ScanDirect, the transfer fails.
As a workaround, you will need to add the following file encryption within the policy settings for those applications:
“\/tmp\/\.com\.apple\.Pasteboard”
The issue was in QuickEdit 6.14 and seems to be present with version 6.15.
So even if you have the latest version of QuickEdit but have the issue you will need this workaround.