Versions of S/MIME earlier than S/MIME version 3.0 are not used for S/MIME connections.
Topic
Configuring Secure/Multipurpose Internet Mail Extension
Applicable to
all
History
Priority
should not
Mar 2022
Versions of S/MIME earlier than S/MIME version 3.0 are not used for S/MIME connections.
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.
2015
Agencies should not allow versions of S/MIME earlier than 3.0 to be used.
2010
Agencies should not allow versions of S/MIME earlier than 3.0 to be used.
2008
Agencies should not allow versions of S/MIME earlier than 3.0 to be used.