Old intermediate incoming mail files (@file{Incoming*}) are deleted
after a couple of days, not immediately. @xref{Mail Source
Customization}.
-@c New in Gnus 5.10.10 / No Gnus 0.8
+(New in Gnus 5.10.10 / No Gnus 0.8)
@c This entry is also present in the node "Oort Gnus".
@end itemize