Rose, S.
, Waltermire, K.
, Jha, S.
, Irrechukwu, C.
and Barker, W.
(2018),
Domain Name System-Based Electronic Mail Security, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.1800-6
(Accessed December 8, 2024)