[Evolution] Filtering based on message status?

[Patrick Walsh <pjwalsh pacbell net>]

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        I hope that this isn't already covered somewhere, but I did not 
see it in the archives or the documentation.

        There is a mechanism for setting up filters based on 
expressions.  But I do not know the variables allowed for the 
expressions.  I hope that there is a way to filter for, for example, 
new mail.  Ideally, then, I could set up a New Mail vFolder that 
looked through my various mail accounts and pulled out the mail 
that I hadn't read.  Is this possible?  

Thanks,

..Patrick

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