COSIMail is an extension for the Email-Client Mozilla-Thunderbird. COSIMail utilizes Semantic Web standards for data represantation and stores Emails in RDF-based Repository using X-Cosim (Cross-Context Semantic Information Management). Conversations, file transfers, tagged Emails etc. are available for other applications.
In Mac OS X 10.4 "Tiger", the default message format for Mail messages changed from the Apple custom mbox-package format to the new emlx format (where messages are stored in individual files for Spotlight indexing). However, if you need to recover from a