Migration Tool install generate error in Postfix and LMTP

After install migration tool, Postfix and LMTP delivery crashes:

Nov 15 00:10:37 zimbra postfix/lmtp[894]: 76B651C0358: to=, relay=zimbra.*.com.br[10.9.8.3]:7025, delay=313, delays=0.01/0.02/313/0, dsn=4.4.2, status=deferred (lost connection with zimbra.*.com.br[10.9.8.3] while performing the LHLO handshake)

Nov 15 00:10:35 zimbra postfix/error[30177]: 3DBA41C0374: to=, relay=none, delay=0.03, delays=0.02/0.01/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with zimbra.****.com.br[10.9.8.3] while sending RCPT TO)

Uninstall Migration tool and server is OK.