sendmail arguments

[John Bruin]

I have inherited a Perl script which sends and parses email. I am having
trouble trying to figure out what the "-oi" and "-oem" arguments do in the
sub below. Can anyone help?

Thanks
John

sub mail(*) {
        my $top = shift;
        open(MAIL, "| $sendmail -t -oi -oem") or die "open: $!";
        $top->print(\*MAIL);
        close MAIL;
}


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