libzdb.so.10 not found

When I try to build a deb package from libzdb-3.0 and want to start,
or do anything, with dbmail I get the following error:

dbmail-imapd: error while loading shared libraries: libzdb.so.10:
cannot open shared object file: No such file or directory


Only the following is available:

# locate  libzdb.so
/usr/lib/x86_64-linux-gnu/libzdb.so
/usr/lib/x86_64-linux-gnu/libzdb.so.11
/usr/lib/x86_64-linux-gnu/libzdb.so.11.0.0
/usr/lib/x86_64-linux-gnu/libzdb.so.9
/usr/lib/x86_64-linux-gnu/libzdb.so.9.0.2
/usr/local/src/libzdb-3.0/.libs/libzdb.so
/usr/local/src/libzdb-3.0/.libs/libzdb.so.11
/usr/local/src/libzdb-3.0/.libs/libzdb.so.11.0.0
/usr/local/src/libzdb-3.0/debian/libzdb/usr/lib/x86_64-linux-gnu/libzdb.so
/usr/local/src/libzdb-3.0/debian/libzdb/usr/lib/x86_64-linux-gnu/libzdb.so.11
/usr/local/src/libzdb-3.0/debian/libzdb/usr/lib/x86_64-linux-gnu/libzdb.so.11.0.0

I'm building dbmail 3.1.17

Any help ?

Thanks!

Matt