Currently the mmmv_mail_protocol_t1 lacks any code.

• Hide metadata as much as one can think of, including who writes to whom and the message receiving time and the messaging frequency.
• Symmetric key encryption, where each encryption key has a unique ID and no user specific data fields.
• Cryptotext modifications should be detectable.  Crypto software will probably include that feature. The mmmv_crypt_t1(TODO: add it to the Fossil repository) already has that feture.

Users U_1 ...U_n form a complete graph G_u. Graph G_uu is like G_u, except that each G_u unidirected edge is replaced with 2 directed edges, one directed edge in each direction. Each of the G_uu directed edges, E_g_uu_k, k inSet(1 to ((n*(n-1)/2)*2=n*(n-1)) ) id est k inSet(1 to (n*(n-1)), represents a virtual mail moving channel.  The users U_1..U_n have symmetric cryptography based one-time keys for each E_g_uu_k. The one-time keys have a key specific probabilistically unique key_ID and they do NOT contain any user-IDs. Each user has a database(It might be an SQLite database)that pairs the key_IDs of that user with the E_g_uu_k-s that exit or enter that user at the G_uu.