[alessio]

Hi All
thanks to Jamie from Stimulus Soft i solve the problem:
"I think the problem may be that zimbra stores username's and not email
addresses.
Try to set the default domain to an empty value. That why when you
authenticate it will pass "alessio" and not "alessio@mailz.oaknet.it"
"
Now it works :-)
more...
it's possbile tu use the full mail account for login simply changing the field "Bind Attribute" fron uid to mail
I hope this can help someone.....

LDAP Server Address: mail.ourdomain.com:389 (FQDNort)
Base DN: dc=ourdomain,dc=com
Service DN: cn=config
Service Account Password: randompassword
Bind Attribute: mail
Email Attribute: mail