Craig, I've been using: objectClasses: ( 1.3.6.1.4.1.10147.1 NAME 'inetLocalMailRecipient' SUP inetorg person STRUCTURAL MAY ( mailAlternateAddress $ mailHost $ mailRoutingAddress ) X-ORIGIN 'user defined' ) The attributes already exist with FDS, but I used that objectclass because of some legacy configs that had it (for reasons I forget - maybe because it was what OpenLDAP used at the time, but my Netscape Directory server had the other attributes for NS Messaging services). Works fine for me - aliases go in mailAlternateAddress, final destination mailbox is mailRoutingAddress. The mail attribute is what's displayed publicly for address book type lookups. Postfix checks mailAlternateAddress, if it finds a match, it relays the message to the account at mailRoutingAddress. Kevin -- Kevin M. Myer Senior Systems Administrator Lancaster-Lebanon Intermediate Unit 13 http://www.iu13.org