Remote linux x86 exploit for Qpopper 3.0beta29 and below. (not 2.5.3) Overflows the LIST command and spawns a shell with the UID of the user who logged in (requires valid account), and GID mail.
6e03060d06070addc039c651e773cc7edd7dfdbf64902dcb1d4ab4b12b4e97df