There has been various attempts made to port to freebsd/solaris, I noted fairly recently someone posted a patch I think for freebsd with notes about some the usual troubles building that I remember and would have solved problems common to a Solaris build. Were these patches ever submitted upstream?
Has anyone ever built this on Solaris successfully? Is Zimbra porting as we speak (ie. should I not waste my time?). I would probably port on Solaris 10 x86, then do a compile afterwards for Sparc/8 upwards as my ancient little Netra will probably take longer to compile than it took to write the source in the first place..