2 // Copyright 2020 Blue Static <https://www.bluestatic.org>
3 // This program is free software licensed under the GNU General Public License,
4 // version 3.0. The full text of the license can be found in LICENSE.txt.
5 // SPDX-License-Identifier: GPL-3.0-only
23 type deliveryServer struct {
28 func (s *deliveryServer) DeliverMessage(env Envelope) *ReplyLine {
29 s.messages = append(s.messages, env)
33 func TestRelayRoundTrip(t *testing.T) {
35 testServer: testServer{domain: "receive.net"},
41 MailFrom: mail.Address{Address: "from@sender.org"},
42 RcptTo: []mail.Address{{Address: "to@receive.net"}},
43 Data: []byte("~~~Message~~~\n"),
47 host, port, _ := net.SplitHostPort(l.Addr().String())
48 relayMessageToHost(s, env, zap.NewNop(), env.RcptTo[0].Address, host, port)
50 if want, got := 1, len(s.messages); want != got {
51 t.Errorf("Want %d message to be delivered, got %d", want, got)
55 received := s.messages[0]
57 if want, got := env.MailFrom.Address, received.MailFrom.Address; want != got {
58 t.Errorf("Want MailFrom %s, got %s", want, got)
60 if want, got := 1, len(received.RcptTo); want != got {
61 t.Errorf("Want %d RcptTo, got %d", want, got)
64 if want, got := env.RcptTo[0].Address, received.RcptTo[0].Address; want != got {
65 t.Errorf("Want RcptTo %s, got %s", want, got)
68 if !bytes.HasSuffix(received.Data, env.Data) {
69 t.Errorf("Delivered message does not match relayed one. Delivered=%q Relayed=%q", string(env.Data), string(received.Data))
73 func TestDeliveryFailureMessage(t *testing.T) {
74 s := &deliveryServer{}
77 MailFrom: mail.Address{Address: "from@sender.org"},
78 RcptTo: []mail.Address{{Address: "to@receive.net"}},
79 Data: []byte("Message\n"),
81 EHLO: "mx.receive.net",
82 RemoteAddr: &net.IPAddr{net.IPv4(127, 0, 0, 1), ""},
85 errorStr1 := "internal message"
86 errorStr2 := "general error 122"
87 deliverRelayFailure(s, env, zap.NewNop(), env.RcptTo[0].Address, errorStr1, fmt.Errorf(errorStr2))
89 if want, got := 1, len(s.messages); want != got {
90 t.Errorf("Want %d failure notification, got %d", want, got)
94 failure := s.messages[0]
96 if want, got := env.MailFrom.Address, failure.RcptTo[0].Address; want != got {
97 t.Errorf("Failure message should be delivered to sender %s, actually %s", want, got)
100 // Read the failure message.
101 buf := bytes.NewBuffer(failure.Data)
102 msg, err := mail.ReadMessage(buf)
104 t.Errorf("Failed to read message: %v", err)
108 // Parse out the Content-Type to get the multipart boundary string.
109 mediatype, mtheaders, err := mime.ParseMediaType(msg.Header["Content-Type"][0])
111 t.Errorf("Failed to parse MIME headers: %v", err)
115 if want, got := "multipart/report", mediatype; want != got {
116 t.Errorf("Want MIME type of %q, got %q", want, got)
119 if want, got := "delivery-status", mtheaders["report-type"]; want != got {
120 t.Errorf("Want report-type of %q, got %q", want, got)
123 boundary := mtheaders["boundary"]
125 if want, got := "Delivery Status Notification (Failure)", msg.Header["Subject"][0]; want != got {
126 t.Errorf("Want Subject field %q, got %q", want, got)
129 if want, got := "<"+env.MailFrom.Address+">", msg.Header["To"][0]; want != got {
130 t.Errorf("Want To field %q, got %q", want, got)
133 // Parse the multi-part messsage.
134 mpr := multipart.NewReader(msg.Body, boundary)
135 part, err := mpr.NextPart()
137 t.Errorf("Error reading part 0: %v", err)
141 // First part is the human-readable error.
142 if want, got := "text/plain; charset=UTF-8", part.Header["Content-Type"][0]; want != got {
143 t.Errorf("Part 0 type want %q, got %q", want, got)
146 content, err := ioutil.ReadAll(part)
148 t.Errorf("Failed to read part 0 content: %v", err)
151 contentStr := string(content)
153 if !strings.Contains(contentStr, "Delivery Failure") {
154 t.Errorf("Missing Delivery Failure")
157 if want := fmt.Sprintf("%s:\n%s", errorStr1, errorStr2); !strings.Contains(contentStr, want) {
158 t.Errorf("Missing error string %q", want)
161 // Second part is the status information.
162 part, err = mpr.NextPart()
164 t.Errorf("Error reading part 1: %v", err)
168 if want, got := "message/delivery-status", part.Header["Content-Type"][0]; want != got {
169 t.Errorf("Part 1 type want %q, got %q", want, got)
172 content, err = ioutil.ReadAll(part)
174 t.Errorf("Failed to read part 1 content: %v", err)
177 contentStr = string(content)
179 if want := "Original-Envelope-ID: " + env.ID + "\n"; !strings.Contains(contentStr, want) {
180 t.Errorf("Missing %q in %q", want, contentStr)
183 if want := "Reporting-UA: " + env.EHLO + "\n"; !strings.Contains(contentStr, want) {
184 t.Errorf("Missing %q in %q", want, contentStr)
187 if want := "Reporting-MTA: dns; localhost [127.0.0.1]\n"; !strings.Contains(contentStr, want) {
188 t.Errorf("Missing %q in %q", want, contentStr)
191 // Third part is the original message.
192 part, err = mpr.NextPart()
194 t.Errorf("Error reading part 2: %v", err)
198 if want, got := "message/rfc822", part.Header["Content-Type"][0]; want != got {
199 t.Errorf("Part 2 type want %q, got %q", want, got)
202 content, err = ioutil.ReadAll(part)
204 t.Errorf("Failed to read part 2 content: %v", err)
208 if !bytes.Equal(content, env.Data) {
209 t.Errorf("Byte content of original message does not match")