Add where the e-mail is on file

Warning²Federal courts, Illinois courts21st and 22nd editions

A personal e-mail is cited like an unpublished letter, closing with a note saying where the message can be found; the two addresses on it are optional.¹

1. 1R. 17.2.4 E-mail Correspondence and Listserv Postings; R. 17.2.3 Letters, Memoranda, and Press Releases; R. 17.2 Unpublished Materials.
2. 2A warning: the form is usually wrong under the rule in note 1, and context can justify it.