The cause of these errors are within our infrastructure.
This is only affecting submissions via the Outlook Add-In. Submission via ClientNet portal and alternate methods are not affected.
We have identified the underlying cause of this issue and currently working on developing a solution. We are aiming to deploy a permanent fix on May 21, 2020. For forther updates please follow this Status Page posting.
As a workaround you may use the following methods for submitting FN samples. Both methods require an Admin to obtain a copy of the mail from the end user.