Wietse Venema writes:
> while investigation unexpected bounces, I noticed that the unionmap did not > handle errors of submaps properly. If a submap generated an error, the > unionmap would not.Cool. Can you also check how pipemap handles this case?
I checked and pipemap shows correct behaviour (e.g. if one of the submaps isan LDAP map that returns an error then the map itself also returns that error).