sqlite> .schema users
CREATE TABLE users (
  username TEXT NOT NULL,
  domain TEXT NOT NULL,
  mailbox TEXT NOT NULL,
  password TEXT NULL
, priority INTEGER);
sqlite> SELECT username, domain, mailbox FROM users;
sm|desu.ne.jp|sm@desu.ne.jp
devnull|desu.ne.jp|devnull@desu.ne.jp
root|desu.ne.jp|sm@desu.ne.jp
postmaster|desu.ne.jp|sm@desu.ne.jp