Mail::SpamAssassin::RegistryBoundaries(3p)

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.