I have been asked this question several times. The short answer is that Archive Sink allows capturing emails that go through a specific SMTP virtual server. Journaling will capture every email...
Published Jul 06, 2004
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Errr - okay, now I feel like a fool for posting that question, the first bit of google-fishing (bring on the new MSN Search!!) I did brought up an older blog (http://blogs.msdn.com/exchange/archive/2004/02/19/76432.aspx) from the Exchange team - which answers my question in a basic fashion at this point - but it does rely on the SMTP box being the endpoint for that email traffic. I'm also interested in mail passing through, rather than being at the end of it's travel... hence ArchiveSink-like functionality would be cool...I'm thinking the sink sample provided in the blog post I just referenced could be modded to do similar things?
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