I may have found something. If I type ldapsearch I get a full listing of the content of the LDAP tables, and I notice this entry:
I'm thinking that either the second entry should be adjusted or deleted. Is this right, and if so, my ldap skills suck more than my linux skills so could someone provide the correct syntax to sort it?
# root, people, domain.co.uk
# root, people, mail.domain.co.uk