Topic

Handling emails with inappropriate, invalid or missing protective markings

Applicable to

all

History

Priority

recommended

Mar 2022

The intended recipients of blocked inbound emails, and the senders of blocked outbound emails, are notified.

Miscellaneous changes were made to rationale and recommendations throughout the publication to clarify content without changing intent. This included a review from the Guidelines for System Hardening chapter through to the Guidelines for Data Transfers chapter.

Mar 2019

The intended recipients of any blocked inbound emails, and the sender of any blocked outbound emails, are notified.

Security control 1023 was reworded.

Feb 2019

The intended recipients of any blocked emails are notified.

2015

Agencies should notify the intended recipient of any blocked emails.

2010

It is recommended agencies notify the intended recipient of any blocked emails.