OUTLOOK READ CONFIRMATION

We develloped an application to automate the import of a specific
mailbox on a daily base.
To make things easier we import the data into access, and then move the
mails in outlook from the in-box to an archive folder;
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a very strange behaviour in this matter is that people who request for
a 'read confirmation' get a message back that the mail was deleted
without being read;
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is their an option that will never send back read or deliver
confirmations (in outlook or exchange server);