John G. Myers. SMTP Service Extension for Authentication. RFC, 2554:1-11, March 1999. [doi]
@article{rfc2554, title = {SMTP Service Extension for Authentication}, author = {John G. Myers}, year = {1999}, month = {March}, doi = {10.17487/RFC2554}, url = {https://doi.org/10.17487/RFC2554}, researchr = {https://researchr.org/publication/rfc2554}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {2554}, pages = {1-11}, }