dnsbl is a library written to help you check if an address is listed on with a dnsrbl. You can either specify a dnsrbl to query or use the builtin list. This package attempts to be as lightweight as possible and provide basic capabilities to query dnsrbl servers.

Query a single dnsrbl server.

r, err := dnsrbl.Query("zen.spamhaus.org", "google.com")
if err != nil {
	log.Fatal(err)
}

if r.Listed {
	// Do something.
}

Query the builtin list of dnsrbl servers.

results, err := dnsrbl.QueryBuiltin("google.com")
if err != nil {
	log.Fatal(err)
}

for _, result := range results {
	if result.Listed {
		// Do something.
	}
}