1package dnsbl_test

2

3import (

4 "context"

5 "log"

6 "log/slog"

7 "net"

8

9 "github.com/mjl-/mox/dns"

10 "github.com/mjl-/mox/dnsbl"

11)

12

13func ExampleLookup() {

14 ctx := context.Background()

15 resolver := dns.StrictResolver{}

16

17 // Lookup if ip 127.0.0.2 is in spamhaus blocklist at zone sbl.spamhaus.org.

18 status, explanation, err := dnsbl.Lookup(ctx, slog.Default(), resolver, dns.Domain{ASCII: "sbl.spamhaus.org"}, net.ParseIP("127.0.0.2"))

19 if err != nil {

20 log.Fatalf("dnsbl lookup: %v", err)

21 }

22 switch status {

23 case dnsbl.StatusTemperr:

24 log.Printf("dnsbl lookup, temporary dns error: %v", err)

25 case dnsbl.StatusPass:

26 log.Printf("dnsbl lookup, ip not listed")

27 case dnsbl.StatusFail:

28 log.Printf("dnsbl lookup, ip listed: %s", explanation)

29 }

30}

31