https://app.knowbase.one/vault/rfc/docid/5404
RFC4952: Overview and Framework for Internationalized Email
Network Working Group J. Klensin Request for Comments: 4952 Category: Informational Y. Ko ICU ...
https://app.knowbase.one/vault/rfc/docid/6335
RFC5825: Displaying Downgraded Messages for Email Address Internationalization
Internet Engineering Task Force (IETF) K. Fujiwara Request for Comments: 5825 JPRS Category: Experimental B. Leiba ISSN: 2070-1721 Huawei Technologies ...