This is a staging table with an entry for each mailbox currently being imported in a controlled way by the user interface. The actual mail contents are in import_message.
Structure of import_mbox
import_id
serial
PRIMARY KEY
tag_idID of the optional tag to assign to all messages from this mailbox.
mail_statusstatus to apply to messages from this mailbox. The value will be copied to mail.status
apply_filterscharacter
'Y' if the filters for incoming mail should be applied when importing this mailbox, 'N' or NULL otherwise.
completionreal
Completion ratio between 0 and 1.
statussmallint
Status of the import. Values are 0=not started, 1=running, 2=aborted, 3=finished.
filenametext
The filename of the mailbox at the client side. This is for information only. The filename is not used to process the actual import, since the contents have already been uploaded to the database.
auto_purgecharacter
'Y' if the entries in import_mbox and import_message should be deleted immediately upon completion, 'N' otherwise. Keeping the entry lets the user interface view the import in a finished state.