If you're using Windows you could use PGPDisk, which allows you to create an encrypted 'virtual' volume, in which you could store your e-mail.
For example, create a 600Mb file called email.pdg using PGPDisk, mount it as X:\ (or whatever) with a password or the passphrase to your public key and copy your e-mail archives into it - maybe into a folder called X:\mail\, then tell your mail client to use the X:\mail\ folder as the mail store.
Every time you boot you can be prompted for the password and when you unmount the PGPDisk, or shutdown, your data becomes safe.
I choose a file size of 600Mb so it will fit on a CD without any hassle.
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If you're using Windows you could use PGPDisk, which allows you to create an encrypted 'virtual' volume, in which you could store your e-mail.
For example, create a 600Mb file called email.pdg using PGPDisk, mount it as X:\ (or whatever) with a password or the passphrase to your public key and copy your e-mail archives into it - maybe into a folder called X:\mail\, then tell your mail client to use the X:\mail\ folder as the mail store.
Every time you boot you can be prompted for the password and when you unmount the PGPDisk, or shutdown, your data becomes safe.
I choose a file size of 600Mb so it will fit on a CD without any hassle.