rhsbl: make sure $transaction->sender defined before accessing it
rhsbl: make sure $transaction->sender defined before accessing it

priyadi/qpsmtpd,sieutruc/qpsmtpd,priyadi/qpsmtpd,smtpd/qpsmtpd,sieutruc/qpsmtpd,salvis/qpsmtpd,msimerson/qpsmtpd,smtpd/qpsmtpd,sieutruc/qpsmtpd,msimerson/qpsmtpd,salvis/qpsmtpd,priyadi/qpsmtpd