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Assuming NULL means "empty field", try
awk -F\| '
NR > 1 {for (i=1; i<=3; i++) if (!$i) {print; next}
if ($4 == "") {print; next}
if ($5+0 <= 0) {print; next}...

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Hello vivekn,

I'm sure it is a good start at this, but what actually goes wrong? Does it fail to send mail, fail to detect the line, or something else?

If the log file is updated a lot, you...

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