>XCLIENT NAME ADDR PROTO HELO REVERSE_NAME
Do NAME and REVERSE_NAME from XCLIENT agree with this description from
smtpd_peer.c ?
/* .IP name
/* The verified client hostname. This name is represented by
/* the string "unknown" when 1) the address->name lookup failed,
/* 2) the name->address mapping fails, or 3) the name->address
/* does not produce the client IP address.
/* .IP reverse_name
/* The unverified client hostname as found with address->name
/* lookup; it is not verified for consistency with the client
/* IP address result from name->address lookup.
