/* mx.h -- name-to-preference association for MX records */structmxentry{unsignedchar*name;intpref;};externstructmxentry*getmxrecords(constchar*);/* some versions of FreeBSD should declare this but don't *//* But only declare it if it isn't already */#ifndef h_errnoexterninth_errno;#endif /* ndef h_errno *//* mx.h ends here */