I reinstalled vpopmail 5.2.1 and now I am having some problems with qmailadmin and sqwebmail. Qmailadmin (1.0.6) will add email accounts, but cannot add alias/forwards. It appears that it works, but the forwards don't appear.
Additionally, sqwebmail does not work properly. Users log in and in the upper right, they see "[EMAIL PROTECTED]" instead of their correct domain name. They can see their messages, but cannot delete/move them. However, some users do see their correct "[EMAIL PROTECTED]". Those users can use their mail normally. I can find no rhyme or reason to who can and can't do this. If I erase their account and recreate it, the problem goes away.
Did you re-compile qmailadmin and sqwebmail?
They both link in the vpopmail code when they are created. All programs using vpommail libraries must be recompiled when it is.