We've begun refusing mail with suspicious_chars_body. Almost all is
junk but there's a trickle of legit mail and I want to be able to tell
those few what was wrong with their message. The usual seems to be
text uploaded from Windows with RETURN in it.
I am trying this, below, to capture the first line with a suspicious
character. The \000 and \015 are to be rewritten to NULL or RETURN
so we can see them, and then $badline is written to syslog.
What I get is NULL by itself, or nothing. Apparently this code matches
on the \000 all right but not on the \015 and I don't know why.
Any ideas?
Joseph Brennan
Columbia University Information Technology
if ($SuspiciousCharsInBody) {
my ($badline);
if (open(IN,"<./INPUTMSG")) {
while(<IN>) {
chomp;
if (/\000/) {
$badline = $_;
$badline =~ s/\000/NULL/g;
}
if (/\015/) {
$badline = $_;
$badline =~ s/\015/RETURN/g;
}
last if ($badline);
}
close(IN);
} else {
$badline = "line not available";
}
# (bounce it and write $badline to log)
}
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