If, however, you are seeing inbound Internet email stuck in an inbound queue, then something else is wrong. Your server should automatically be recognizing that certain addresses (i.e., names misspelled) don't exist in your organizations and be handling these appropriately instead of attempting to deliver them. You don't give a lot of details in your question, but things I'd look at in troubleshooting this problem include message header information for the problematic messages, recipient policy settings and errors/warnings in the application event log on the server.
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