WpSubmissionConversationStore
Corex\Config\Submissions\WpSubmissionConversationStore · class · Config layer
Keeps those emails as the submission’s post meta, one row to an email, so that two recorded at once are both kept. A row names an email by its id and holds its subject, which a site may have written the person’s name into (“Thank you, Salma”): it is removed when the submission is anonymized, and goes with it when WordPress deletes it.