Prior to V8
sendmail, if the list of recipients contained an
address that began with any of the prescanned switches,
sendmail would wrongly view that recipient as a
switch during its prescan phase. For example, mail to
bill, -Cool caused sendmail to try to
use a file named
ool as its configuration file.
Command-line switches must precede recipient addresses. Switches that are mixed in with recipient names are treated as recipient addresses.
Old versions of sendmail (including IDA and some versions of BSD) would syslog(3) a warning if the old frozen configuration file didn’t exist. The V8 and SunOS versions of sendmail no longer check for a frozen configuration file, so nothing is ever logged about this.
Prior to V8 sendmail, unknown command-line
switches were silently ignored. Therefore, sending mail from a shell
script could fail for reasons that were difficult to find. For
example, specifying the preliminary hop count wrongly with
-j, instead of correctly with
-h, caused your presetting of the hop count to be
Some old BSD and SunOS versions of sendmail set the default
sender’s full name from the environment variable
NAME even when running as a daemon or when processing the queue. This
can lead to the superuser’s full name occasionally
showing up wrongly as a sender’s full name. IDA and
V8 sendmail clear the full name in
-q modes but use
different methods. To prevent this problem under other versions of
sendmail, the env(1) program can be ...