>We have many users using our program to email, most of them work fine, however a couple of them can send an email only once from our program. No errors are created, the email just doesn't appear in the outbox of Outlook Express. If they close down our program and then restart it they can send another email but again only once.
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Hi John,

It seems like a problem with particular PC's. Did you try to install all the latest OS updates on them? Reinstall OE?