Example of routing in LDAP
dn: cn=Ray Jackson,ou=People,o=cern,c=ch
mail: Ray.Jackson@cern.ch
objectclass: inetLocalMailRecipient
mailHost: mail4.cern.ch
mailRoutingAddress: rjackson@mail4.cern.ch
mailLocalAddress: Ray.Jackson@cern.ch
mailLocalAddress: rjackson@mail.cern.ch
mailLocalAddress: Raymond.Jackson@cern.ch
mailLocalAddress: ldap.support@cern.ch