create dead.letter with FileMode instead of 0666

update for MIME encapsulated error messages

implement b mailer flag

fix bug that can cause senders to be queued as recipients if the
name server is down when the mail is initially sent

move #include <sys/stat.h> into conf.h

use FileMailer instead of ProgMailer

have getmxrr look at $=w to determine local host name

debugging printf in mailfile

change remotename to use flag bits instead of individual parameters;
add a pstat parameter to return status information up

turn off DEFNAMES and DNSRCH in hostsignature for old config file
compatibility

let the $@ clause of an SMTP mailer be a colon separated list of
hosts; these will be searched like MX records

reset statmsg before each mailer invocation to avoid bogus messages
in log

add Directory mailer field

fixes to properly compute priority, nrcpts, etc. on requeued delivery

give more info on error messages

clear FATALERRS indication in cloned envelope; use e_statmsg for
logging of OK status

attempt at quick RCPT response

additional checking on pipe file handling

try to fall back to MX sites if there is a failure anywhere
in delivery (not just in connection establishment)

improve error reporting; open new transcript on envelope cloning

initial hooks for ISO networking

include a warning timeout after some interval; get rid of QueueRun
global and put it in the envelope; some other minor bug fixes

move SendMode and ErrorMode into the envelope

POSIX changes; use dup2

make certain we always enqueue split envelopes