How to extend schema for missing object!

[magobin at gmail.com (Alex aka Magobin)]

Hi at all, I'm configuring Postfix with Fedora DS, but reading
documentation, I need two object in all ldap entry:

MailMessageStore
MailAlternateAddress

I know some workaround but, for my skill and to avoid problems in future
I would to know how can I extend schema or import this objects for all
my entry!...


thanks in advance

Alex