And also because it won't work. The limit is imposed by the PAM module which changes password. The code identified here just allows the panel to give good feedback, rather than just a failed password change attempt.
http://bugs.contribs.org/show_bug.cgi?id=3039
I just changes some poor users pwd to another 6 chars pwd thru the webinterface, and could login on webmail with that new pwd all OK.
Also this user can login to SMB OK.
He can NOT change his pwd within XP to another 6 chars pwd!!
He can change his pwd within XP to another 7 chars pwd.
WinXPPro pwd change msgbox claims (error?) that the pwd should be at least 5 chars, containing 3 out of 4 of the following groups: lowercase, uppercase, Numerals, Non-alphabetic.
Q: what exactly is supposed not to work?