ldap accept query is very effective here and have been using since day-1.
Recently, we discover some backend mta log that rejecting invalid address.
We haven't change ironport or the backend ldap software for a while. So it is not something that due to recent change.
Here is a funny finding, note the space.
Select which LDAP query to test:
Address to use in query:
> sys [email protected]
LDAP query test results:
Address: sys [email protected]
LDAP query test finished.
I run a ldapsearch on the backend LDAP server and the ldapsearch does not return the 'sys [email protected]' as valid LDAP entry. So it seems it is not related to LDAP.
This is our ldap accept query
Our ldap backend is Openwave MX LDAP directory.
We do considering upgrading to 5.5 version but it was not due to this problem. but rather than try to keep our version reasonably up-to-date.