CREATE TABLE mailfolders (
    id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
    name VARCHAR(255) NOT NULL,
    parentid INTEGER,
    parentaccountid INTEGER,
    status INTEGER,
    displayname VARCHAR(255),
    servercount INTEGER,
    serverunreadcount INTEGER,
    serverundiscoveredcount INTEGER,
    FOREIGN KEY (parentaccountid) REFERENCES mailaccounts(id),
    FOREIGN KEY (parentid) REFERENCES mailfolder(id));