is tor an email mixmaster?

[M. Peterson]

Hi

want to know, if tor is as well an email mixmaster,
e.g. we have an email client, which is sending only pgp encrypted emails,
then the ISP is excluded as he cannot read, but data retention laws allow to
log the IP from where the email is sent and the email server knows the last
exit point of the encrypted package (email).
If now in this email client an onion routing system would be enabled, then
all email (enc. Packages) would be routed, and some exit nodes would deliver
them.
Is this already possible with Tor? Are there enough exit nodes? would it be
possible and useful for email services to force every node to be an exit
node for encry. packets to email accounts? how much bandwidth is a node
requiring then for mixing/forwarding emails only?
are there developers working on that? or interested?

Regards
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