Apart from e-mail an mbox can contain Usenet posts. EF imports those without problems but doesn’t show the Newsgroups: header, so they look like mails with no recipient.
Thanks for adding this. Unfortunately it doesn’t work…
When viewing source I see a line like “Newsgroups: de.comp.sys.mac.misc” and no To:, but EF shows only subject, from, and date.
Do I have to rebuild any indexes?
This only takes effect for mailboxes that were imported after updating to EagleFiler 1.3. To force a rebuild of a mailbox table of contents, quit EagleFiler and then open the Indexes folder inside of the .eflibrary package. Then delete the appropriate .efmailtoc file. You can find the number of a given mailbox by hovering over its icon in EagleFiler’s Info inspector.