I'm using qmail-1.03+vpopmail-4.9.8-1+mysql-3.23.33+sqwebmail-1.2.5+courier-imap-1.3.2 . I've successfully compiled and installed vpopmail with mysql support (--enable-mysql=y), then I've successfully redo qmailadmin configure and install; it works fine, when I edit/add/del a user account vpopmail database comes updated. If I try to authenticate a user via POP3 it works. When I try to compile sqwebmail (also with courier-imap) to update, I get error message below: env LIBS="-L/usr/lib/mysql -lmysqlclient" ./configure --enable-webpass=vpopmail --enable-logincache --without-authpwd --without-authshadow --without-authpam --without-authuserdb --without-authld ap --without-authmysql --without-authdaemon --with-authvchkpw make configure-check make ..... ..... /usr/lib/mysql/libmysqlclient.a(my_compress.o): In function `my_uncompress': my_compress.o(.text+0x97): undefined reference to `uncompress' /usr/lib/mysql/libmysqlclient.a(my_compress.o): In function `my_compress_alloc': my_compress.o(.text+0x12b): undefined reference to `compress' collect2: ld returned 1 exit status make[1]: *** [authvchkpw] Error 1 make[1]: Leaving directory `/home/dario/mailserver/sqwebmail-1.2.5/authlib' make: *** [all-recursive] Error 1 Please help me to solve it. Thanks. Dario