TY  - RPRT
TI  - Email authentication mechanisms: DMARC, SPF and DKIM 
AU  - Nightingale, Stephen J
PY  - 2017
PB  - National Institute of Standards and Technology
CY  - Gaithersburg, MD
SN  - NIST TN 1945
DO  - 10.6028/NIST.TN.1945
ER  -