Trying to limit acces to an attribute

["Andres Tarallo" <tarallo@ort.edu.uy>]

I'm setting an OpenLDAP server, for small company For historical reason each
users in ths company has two email address user@domain and user@olddomain. 

Both address are used for sending and receiving email Howver we want to make
sure that only the user@domain ones are show in the address book of
squirellmail So I thaught of an ACL like this

access to attrs=mail matchingRule.regex="\@domain"
      by peername "ip.of.web.mail" none
      by * read

But this seems to have no effect. I need some example or tips for debugging
this problem. Thanks

Andres
-- 
A/P Andres Tarallo
Universidad ORT Uruguay