1 1999-03-02 09:44:33 U=CALLER sender verify fail for <unknown@x.x.x.x>: response to "RCPT TO:<unknown@x.x.x.x>" from 127.0.0.1 [127.0.0.1] was: 550 unrouteable address
2 1999-03-02 09:44:33 U=CALLER F=<unknown@x.x.x.x> rejected RCPT <unknown@u.u.u.u>: Sender verify failed
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