Hypermail 2, a popular tool that converts mails into html, has two buffer overflows. One exists in the hypermail program itself and another is in the CGI program mail. The overflow in the main program can be overflowed by sending an email while the CGI program can be overflowed by a DNS server being populated with faulty information. Versions affected: 2.1.3, 2.1.4, 2.1.5, possibly others. 2.1.6 is not affected.