Short description of ANT 4 MailChecking 3.5: ANT 4 MailChecking is an e-mail checker and spam mail filter program. It' s very easy to set up and use. It allows you to set up as many separate accounts as you like and checks for new messages at a regular interval of your choosing. ANT 4 MailChecking allows you to define a variety of spam filtering rules, including the option to shutdown your PC by email.