is there any sensitive data in ~/.cache/thunderbird ?

<blockquote> Are there any more "sensitive" folders and cache used by thunderbird? </blockquote> Thunderbird uses the cache the same way as Firefox - for caching web content. Whether there's something "sensitive" with it, that depends on your threat model. <blockquote> I read every question i found here but the best suggestion was to encrypt the whole disk and not use per-application encryption. </blockquote> To me encrypting the entire disk would make more sense than encrypting selective folders for certain applications. <blockquote> Does thunderbird have an internal mechanism to encrypt all data? </blockquote> Thunderbird can encrypt messages, either using S/MIME or PGP. It doesn't encrypt the profile per se.