drop Envelope Index + Protected Index · envelope metadata · sender subject snippet · mailboxes threads accounts · runs locally
HomeDomain — Library/Mail/V*/MailData/Envelope Index · Protected Index · AccountsV2.plist
mail databases
drop Envelope Index · Protected Index · AccountsV2.plist
snippet previews body text even without .emlx message files
drop Envelope Index, Protected Index, AccountsV2.plist