Taking a step back, these are all basically problems rising out of an
accept-and-scan content handling policy.
I'd suggest you see if you can do SMTP time scanning instead - it works
in much cleaner fashion than pushing the mail multiple times through
the mail system.
Nigel.
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[ Nigel Metheringham Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]