built from sources, mail merge not working

Hi,
our own build of LO 4.1.0.4 on XStreamOS/illumos, has problems with mailmerge.
Testing the account on the options pane, says:
LibreOffice could not connect to the outgoing mail server. Check your system's settings and the 
settings in LibreOffice. Check the server name, the port and the secure connections settings
--
unsatisfied query for interface of type com.sun.star.loader.XImplementationLoader
Is there anything I should enable during config to allow for mailmerge to work?
Here is my configure:
./configure --prefix=/usr --mandir=/usr/share/man --bindir=/usr/bin --libdir=/usr/lib 
--sbindir=/usr/sbin --infodir=/usr/share/info --sysconfdir=/etc --build=i386-pc-solaris2.11 
--with-parallelism=8 --enable-gtk3 --disable-python --with-system-libs 
--with-system-altlinuxhyph=no --with-system-lpsolve=no --with-jdk-home=/usr/jdk/jdk1.7.0_45 
--with-x --enable-gstreamer --disable-gstreamer-0-10 --with-build-version="Sonicle XStreamOS-153" 
--with-vendor="Sonicle S.r.l." --with-lang="en-US en-GB de fr it es ru ja nl zh-CN zh-TW" 
--srcdir=/sources/userlands/xstream-userland-gate/components/libreoffice/libreoffice/libreoffice-4.1.0.4
 --enable-option-checking=fatal
Thanks for any help,
Gabriele.