Milter-greylist

> > Weirder and weirder... can you look if this macro is defined (and is
> > not ultimately undefined without redefinition) in the config.h which
> > should be generated by your configure script?
> 
> I do not have defined. Actually this is what I have in it:
> 
> /* Packaging metadata: distro contact */
> /* #undef PACKAGE_URL */
> 

Actually looking at the code it is valid
the PACKAGE_URL not to be defined.

It is the code in the milter-greylist.c
which should be prepared to properly
handle the case when it is not defined.