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Recipient verification fails with ldaps

hagman_01
When my UTM tries to verify inbound mail recipients against Active Directory, I find this in smtp.log:

Warning: ACL "warn" statement skipped: condition test deferred: failed to bind the LDAP connection to server 10.0.0.5:3269 - ldap_bind() returned -1



This is weird because both connectivity tests for the auth server return "OK". What can be the problem?


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  • 0
    It a know issue i think :


    ID24065 9.004 Regression from V8: Recipient Verification against AD not working with LDAP-SSL
    ------------------------------------------------------------------------
    Description:  SMTP recipient verification against AD is not working with
                  LDAP-SSL.
    Workaround:   Option 1: Switch to non encrypted LDAP connections or
                  recipient verification with callout.
                  
                  Option 2: Add the following line to
                  /var/chroot-smtp/etc/openldap/ldap.conf
                  
                  TLS_REQCERT allow
                  
                  According to ldap.conf(5) - Linux man page :
                  
                  TLS_REQCERT 
                                Specifies what checks to perform on server
                  certificates in a TLS session, if any. The  can be
                  specified as one of the following keywords:
                  ...
                  allow
                    The server certificate is requested. If no certificate
                  is provided, the session proceeds normally. If a bad
                  certificate is provided, it will be ignored and the
                  session proceeds normally.
    Fixed in:
Reply
  • 0
    It a know issue i think :


    ID24065 9.004 Regression from V8: Recipient Verification against AD not working with LDAP-SSL
    ------------------------------------------------------------------------
    Description:  SMTP recipient verification against AD is not working with
                  LDAP-SSL.
    Workaround:   Option 1: Switch to non encrypted LDAP connections or
                  recipient verification with callout.
                  
                  Option 2: Add the following line to
                  /var/chroot-smtp/etc/openldap/ldap.conf
                  
                  TLS_REQCERT allow
                  
                  According to ldap.conf(5) - Linux man page :
                  
                  TLS_REQCERT 
                                Specifies what checks to perform on server
                  certificates in a TLS session, if any. The  can be
                  specified as one of the following keywords:
                  ...
                  allow
                    The server certificate is requested. If no certificate
                  is provided, the session proceeds normally. If a bad
                  certificate is provided, it will be ignored and the
                  session proceeds normally.
    Fixed in:
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