E-mail messages that you’ve deleted are still stored in their mailbox files, but
they are hidden from view. This option in the View menu lets you see all of
the messages, even the deleted ones. To undelete a message, select it and press
Delete.
There are two ways to compact a mailbox to remove the deleted messages:
- Select all the (non-deleted) messages in the mailbox, choose
Export…, import the newly created mailbox file, and delete the
original. (This way is faster but does not preserve the tags and notes
on the messages.)
- Make a folder, move the non-deleted messages to the folder, select them
in the folder and choose Merge Message Files, and delete the
original mailbox.