"If you are documenting a communication you received, pertinent information includes a reference to yourself as author or by name in the Tile of Source element." (MLA 124).
You will need to include both an in-text and works cited entry for personal communications.
Parenthetical in-text citation: (Lacey)
Narrative in-text citation: In the email Lacey received from the instructor, the course was described as being an overview of the theoretical framings used in literary criticism
Lacey, Sajni. Personal communication with faculty. 11 Aug. 2021.