The multilevel system of a filtration of e-mail from undesirable messages is developed and realized. The system is based on spam revealing to formal signs of the message. a time delay of the message with the subsequent inquiry about acknowledgement of its legitimacy. Research of influence of time of a delay on efficiency of a method of recognition of spam is conducted. https://countryscenesaddleryandpetsuppliers.shop/product-category/argentina-cow-leather-one-ear-headstall/