don't ignore postmaster alias for emergency fallback

only flock regular files (specifically, not /dev/null)

compile flag hpux ==> __hpux

need sys/stat.h

move compatibility hooks for S_ISREG et al to conf.h

getloadavg(3) -> libc; sysctl no longer needs libutil or libkvm

hpux => __hpux

check for message size exceeded

adjust ctladdr on Q runs; fix lost CNAME problem; getmxrr match
against $=w instead of $j; "a" mailer flag + ESMTP enhancements; extend
"b" option to include max message size; NeXT & HPUX compat chan

adjust ctladdr on Q runs; fix lost CNAME problem; getmxrr match
against $=w instead of $j; "a" mailer flag + ESMTP enhancements; extend
"b" option to include max message size; NeXT & HPUX compat changes; up
default buffer sizes; fix backslash scanning problem; misc cleanup

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add x400-received to list of H_TRACE fields

make tty id buffer large enough for modern names

up some of the values to be more generous

fix an uninitialized variable problem

clean up setsid handling

NeXT portability changes

add HASSETSID on #ifdef _POSIX_VERSION

use "a" mailer flag to attempt to use ESMTP; send SIZE=
on MAIL command if it is supported

reject messages exceeding maximum message size

extend "b" option to include maximum message size

print out other fields

delete mci_options; use mci_flags instead

add M_ESMTP

quote need not be in DELIMCHARS either

fix some problems with backslash handling

delete duplicate 8th bit stripping