I've just set set mrbs, which is excellent btw, but I'm having issues with booking emails sent to users. I'm using AD ldap for authentication, using the sAMAccountName attribute, as a consequence outgoing mail is looking for sAMAccountNameatmydomain.co.uk. I need some way to specifiy that the email config use the mailNickname attrib, or to tell mrbs to use the email address in the AD ldap. Does anyone know how to do this? Many thanks, MJ.