fix email

internal/modules/email_sender/sender.go

@@ -133,7 +133,7 @@ func buildMessage(from, fromName, to, subject, replyTo, body, html string) []byt
 	b.Grow(len(from) + len(fromName) + len(to) + len(subject) + len(body) + len(html) + 512)
 	b.WriteString("From: ")
 	if fromName != "" {
-		b.WriteString(mime.QEncoding.Encode("utf-8", fromName))
+		b.WriteString(mime.BEncoding.Encode("utf-8", fromName))
 		b.WriteString(" <")
 		b.WriteString(from)
 		b.WriteString(">\r\n")

internal/modules/email_sender/sender_test.go

@@ -10,6 +10,7 @@ import (
 	"crypto/x509/pkix"
 	"math/big"
 	"net"
+	"net/mail"
 	"strings"
 	"testing"
 	"time"
@@ -183,7 +184,7 @@ func TestSendSuccess(t *testing.T) {
 		raw := string(data)
 		for _, want := range []string{
 			// From с отображаемым именем (RFC 2047).
-			"From: =?utf-8?q?",
+			"From: =?utf-8?b?",
 			"<sender@example.com>",
 			"To: user@example.com",
 			"Subject: =?utf-8?q?",
@@ -270,7 +271,7 @@ func TestBuildMessage(t *testing.T) {
 		"текст", "<html><body>текст</body></html>",
 	))
 	for _, want := range []string{
-		"From: =?utf-8?q?",
+		"From: =?utf-8?b?",
 		"<sender@example.com>",
 		"To: user@example.com",
 		"Subject: =?utf-8?q?",
@@ -354,3 +355,19 @@ func TestValidateMessage(t *testing.T) {
 		t.Error("пустая тема принята")
 	}
 }
+
+func TestBuildMessageSenderNameRoundTrip(t *testing.T) {
+	const name = "Вечерний детектив"
+	raw := buildMessage("sender@example.com", name, "user@example.com", "Привет", "", "текст", "")
+	message, err := mail.ReadMessage(strings.NewReader(string(raw)))
+	if err != nil {
+		t.Fatal(err)
+	}
+	from, err := message.Header.AddressList("From")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(from) != 1 || from[0].Name != name || from[0].Address != "sender@example.com" {
+		t.Fatalf("неверный отправитель: %+v", from)
+	}
+}