Lets the data hook handle missing envelope sender/recipient, then falls back to the builtin 503 response (Brian Gross)
Lets the data hook handle missing envelope sender/recipient,
then falls back to the builtin 503 response (Brian Gross)


git-svn-id: 5bd49132847c26fb0bf09d36ee8823e0080b2740@359 958fd67b-6ff1-0310-b445-bb7760255be9

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