1999-03-02 09:44:33 U=CALLER F=<> rejected RCPT <a@b.c> 1999-03-02 09:44:33 U=CALLER F=<> rejected RCPT <x@y.z> 1999-03-02 09:44:33 U=CALLER F=<> rejected RCPT <a@b.c> 1999-03-02 09:44:33 U=CALLER F=<> rejected RCPT <x@y.z>