Parse .eml files

[bachmeier]

I want to save all email messages related to a research project 
into a directory, call a D program to generate an index of all 
messages, and push it to the repo server. That way all coauthors 
have access to all email messages even if they joined a project 
after several years. My client is Thunderbird, which by default 
creates .eml files.

Is there a way to do this in D? The email libraries I've found 
don't appear to work with .eml.