Sam, what's going on here? Can you shed any light on this?
This makes half a dozen of us who have run into this problem, with no clues whatsoever.
There is no sufficient information to go on. The sender simply reports that sendmail failed with a non-zero exit status. sendmail normally reports an error message, before terminating with a non-zero exit status. The shell script that invokes sendmail must be modified to capture the error message.
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