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This new program detects duplicate Windows Live Mail messages.As for deletion, that extra step has to be done manually. Depending on the future development of WLM that can be changed. One of these 3 features will allow automatic deletion:

1. WLM's ability to synchronize message-files dynamically. - Not to display summaries for missing eml-files.
2. Basic API support.
3. Command-line option that would instruct WLM to delete specified message(s).

Perhaps sending massive feedback to Microsoft can encourage them to implement some of those features.