[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] EAO (Expected Annual Occurence)  electronic crimes  email      abuse      architecture      client-server email relays      DMZ networks, and      gateways  [See SMTP gateways]     mapping addresses  [See aliases]     readers      relay access         SMTP AUTH, and          STARTTLS, and      securing Internet      services on firewall      SMTP relays         access          client-server          open relays and email abuse          server-server  encrypted     (unencrypted) keys and server certificates      email      file transfers  2nd  [See also sftp]         good methods for      packets      sessions      SSL tunnels      Telnet  2nd      zone transfers  entropy, defined  environment variable access control in Apache  Exim  2nd  Expected Annual Occurrence (EAO)  EXPN, SMTP command  external DNS