Uh-oh.
Um, maybe both check mailboxes?
EyesHigh76, you might want to check sent mails and even drafts (maybe it wasn't sent but remained as a draft? happened to me once), check also sent mails for the date when it was send (an to the correct address?), maybe that helps Maggie to check if something arrived.
Maggie might look at inbox, older mails, Spam, subdirectories ("folders") - maybe it was automatically moved elsewhere due to a filter rule?