Method isJunk

app/src/main/java/eu/faircode/email/DnsBlockList.java:159–173

(Context context, String[] received)

    }

    static Boolean isJunk(Context context, String[] received) {
        if (received == null || received.length == 0)
            return null;

        String host = getFromHost(MimeUtility.unfold(received[received.length - 1]));
        if (host == null)
            return null;
        boolean numeric = host.startsWith("[") && host.endsWith("]");
        if (numeric)
            host = host.substring(1, host.length() - 1);
        else if (!PatternsCompat.DOMAIN_NAME.matcher(host).matches())
            return null;

        return isJunk(context, host, true, BLOCK_LISTS);
    }

    static Boolean isJunk(Context context, List<Address> addresses) {
        if (ContactInfo.getLookupUri(addresses) != null)