LSMTP is the fastest e-mail delivery system on the market. What distinguishes LSMTP from other e-mail delivery systems is its speed and ability to deliver large volumes of e-mail on modest hardware. This speed and efficiency can reduce the need for multiple servers, saving money and administrative overhead. LSMTP is easy to use and requires no administrative supervision for normal use. On an average day, more than 18 million messages around the world are sent using LSMTP.