NAME

       Mail::SpamAssassin::RegistryBoundaries - domain delegation rules

METHODS

       ($hostname, $domain) = split_domain ($fqdn, $is_ascii)
           Cut a fully-qualified hostname into the hostname part and the domain part, splitting
           at the DNS registry boundary.

           Examples:

               "www.foo.com" => ( "www", "foo.com" )
               "www.foo.co.uk" => ( "www", "foo.co.uk" )

           If $is_ascii given and true, skip idn_to_ascii() conversion

       $domain = trim_domain($fqdn, $is_ascii)
           Cut a fully-qualified hostname into the hostname part and the domain part, returning
           just the domain.

           Examples:

               "www.foo.com" => "foo.com"
               "www.foo.co.uk" => "foo.co.uk"

           If $is_ascii given and true, skip idn_to_ascii() conversion

       $ok = is_domain_valid($dom, $is_ascii)
           Return 1 if the domain/hostname uses valid known TLD, "undef" otherwise.

           If $is_ascii given and true, skip idn_to_ascii() conversion.

           Note that this only checks the TLD validity and nothing else.  To verify that the
           complete fqdn is in a valid legal format, Util::is_fqdn_valid() can additionally be
           used.