Aaron Stone wrote:
This might be important if you're searching for uncommon headers. Of course, uncommon headers probably also mean that they're uncommonly searched for...
Don't count on it. Offlineimap is a common client for syncing imap-instances. It uses it's own header-type where both key and value are unique per message:
X-OfflineIMAP-901701146-4c6f63616c4d69726a616d-494e424f58: 1086726519-0790956581151 -- ________________________________________________________________ Paul Stevens [EMAIL PROTECTED] NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31 The Netherlands_______________________________________www.nfg.nl
