Not sure which flavour of BSD is installed on this box as I didn't set it up myself, however sed -i produces : 
sed: illegal option -- i
usage: sed script [-an] [file ...]
       sed [-an] [-e script] ... [-f script_file] ... [file ...]

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In reply to Re^6: Strange Problem by capoeiraolly
in thread Strange problem trying to clean garbage from start of mailbox file by capoeiraolly

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