I have migrated a ccounts from zimbra 5 to 7 and there is a red asterisk on the accounts

I have looked at http://www.zimbra.com/forums/adminis...port-quot.html

when I ran zmprov ma user@domain.com zimbraMailTransport lmtp:your.zimbra.server:7025, on an account, I get this error

ERROR: service.FAILURE (system failure: java.lang.NullPointerException)

what could be the problem?