You can now create your own user accounts on my #Tor-ified MTA: http://adduser.3w2s7tpb5mc7ubsjjnzp4oxvqupjeoywzwdxfvfnjn3toqbuzgkn7kqd.onion/
Once your account is created, you can use IMAP and SMTP or webmail at http://3w2s7tpb5mc7ubsjjnzp4oxvqupjeoywzwdxfvfnjn3toqbuzgkn7kqd.onion/
If you need a .onion email service, feel free to use my MTA.