Directory traversal vulnerability in 1st Class Mail Server 4.01 allows remote attackers to read arbitrary files via a ".." (dot dot) sequences in unknown vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15812
http://www.securityfocus.com/bid/10089
http://securitytracker.com/alerts/2004/Apr/1009705.html
http://secunia.com/advisories/11330
http://members.lycos.co.uk/r34ct/main/1st%20Class%20mail%20server%204.01.txt