Update User Data in WordPress, depending from domain
-- generic email addresses and new passwords for users
UPDATE wp_users
SET user_email = CONCAT(user_login, '@example.com'),
user_pass = MD5(CONCAT(RAND(), CAST(ID AS CHAR), user_login));
-- generic email addresses for commentors
UPDATE wp_comments
SET comment_author_email = CONCAT(CAST(comment_ID AS CHAR), '@example.com');
-- admin email address
UPDATE wp_options
SET option_value = 'admin@example.com'
WHERE option_name = 'admin_email';