On 19. Aug 2011, at 15:09 Uhr, Ralf Hildebrandt wrote: > * Ray Davis <ray-li...@carpe.net>: > >> What would cause valid email addresses to be unknown periodically? >> They are valid before and after the following log entries and nothing >> on the server was changed. > > Is postmap run on the virtual_alias_maps from time to time?
Yes - The Mac OS X user admin GUI does this whenever users are added or changed. -R
