M.sys.mail({ to: ['test1@test.com', 'test2@test.com'] });
M.sys.mail({ to: ['test1@test.com', 'test2@test.com'], subject: '제목' });
M.sys.mail({ to: ['test1@test.com', 'test2@test.com'], subject: '제목', content: '내용' });
M.sys.mail({ to: ['test1@test.com', 'test2@test.com'], cc: ['cc1@test.com', 'cc2@test.com'], bcc: ['bcc1@test.com', 'bcc2@test.com'], subject: '제목', content: '내용' });