horde library bug - unchecked from-address

Hi, this bug we discovered recently. HORDE 1.2.0 $from-bug and how to exploit with IMP 2.2.0 Disclaimer: This is intended as a paper for sysadmins who want to secure their systems. It is NOT a how to for scriptkiddies to run any attack on a IMP-using site. The authors of this text will not be hel...