Apple Mail keeps suggesting a previously-entered incorrect e-mail address

In Apple Mail, I once entered an incomplete e-mail address that did not have the top level domain (e.g., .com) and sent it out to the recipient. Since then, Apple Mail's auto complete keeps suggesting this incomplete e-mail address even though I want the program to forget it. There is an article (https://support.apple.com/guide/mail/delete-email-addresses-mlhlp1113/mac) that shows how to prevent Apple Mail from suggesting e-mail addresses that are stored in Contacts by removing the e-mail from the Contact Card, but my problem is that this incomplete e-mail address is not stored in any Contact Card, it was entered purely by mistake in the context of Apple Mail. Would anybody have insight into how to have Apple Mail forget the e-mail? Thank you for reading.