[1] RFC 4550: Internet Email to Support Diverse Service Environments (Lemonade) Profile, 2023-03-24T05:20:34.000Z https://www.rfc-editor.org/rfc/rfc4550.html

[2] RFC Errata Report » RFC Editor, 2023-03-24T05:23:22.000Z https://www.rfc-editor.org/errata/rfc4550

[3] RFC 5550: The Internet Email to Support Diverse Service Environments (Lemonade) Profile, 2023-03-24T05:24:11.000Z https://www.rfc-editor.org/rfc/rfc5550.html