%% You should probably cite rfc6856 instead of this I-D. @techreport{ietf-eai-rfc5721bis-04, number = {draft-ietf-eai-rfc5721bis-04}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-eai-rfc5721bis/04/}, author = {Randall Gellens and Chris Newman and Jiankang Yao and Kazunori Fujiwara}, title = {{POP3 Support for UTF-8}}, pagetotal = 14, year = 2012, month = apr, day = 10, abstract = {This specification extends the Post Office Protocol version 3 (POP3) to support un-encoded international characters in user names, passwords, mail addresses, message headers, and protocol-level textual strings.}, }