Don't believe those who loudly claim email can not avoid metadata! They are ignorant of our continuous works on minimizing metadata:
DONE:
- no phone number other identifying data needed
- no cleartext "Subject"
- no cleartext "To"
- randomized "Date"
- no IP addresses
- group/avatar/attachment/etc metadata only contained in encrypted message parts
Upcoming:
- servers to never see cryptographic ID metadata
- remove "threading" and auxilliary headers
- experiment with Sealed Sender