Add remaining address headers (#10)

Added remaining address headers from https://tools.ietf.org/html/rfc2822#section-3.6

envelope_test.go

@@ -536,6 +536,21 @@ func TestParseEncodedAddressList(t *testing.T) {
 	if got != want {
 		t.Errorf("To was: %q, want: %q", got, want)
 	}
+
+	senderAddresses, err := e.AddressList("Sender")
+	if err != nil {
+		t.Fatal("Failed to parse Sender list:", err)
+	}
+	if len(senderAddresses) != 1 {
+		t.Fatalf("len(senderAddresses) == %v, want: %v", len(senderAddresses), 1)
+	}
+
+	// Confirm address name was decoded properly
+	want = "André Pirard"
+	got = senderAddresses[0].Name
+	if got != want {
+		t.Errorf("Sender was: %q, want: %q", got, want)
+	}
 }
 
 func TestDetectCharacterSetInHTML(t *testing.T) {

example_test.go

@@ -47,7 +47,7 @@ func Example() {
 	fmt.Printf("Attachments: %v\n", len(env.Attachments))
 
 	// Output:
-	// From: James Hillyerd <jamehi03@jamehi03lx.noa.com>
+	// From: James Hillyerd <jamehi03@jamehi03lx.noa.com>, André Pirard <PIRARD@vm1.ulg.ac.be>
 	// To: Mirosław Marczak <marczak@inbucket.com>
 	// Subject: MIME UTF8 Test ¢ More Text
 	// Text Body: 1300 chars

header.go

@@ -41,12 +41,19 @@ var errEmptyHeaderBlock = errors.New("empty header block")
 // AddressHeaders is the set of SMTP headers that contain email addresses, used by
 // Envelope.AddressList().  Key characters must be all lowercase.
 var AddressHeaders = map[string]bool{
-	"bcc":          true,
-	"cc":           true,
-	"delivered-to": true,
-	"from":         true,
-	"reply-to":     true,
-	"to":           true,
+	"bcc":             true,
+	"cc":              true,
+	"delivered-to":    true,
+	"from":            true,
+	"reply-to":        true,
+	"to":              true,
+	"sender":          true,
+	"resent-bcc":      true,
+	"resent-cc":       true,
+	"resent-from":     true,
+	"resent-reply-to": true,
+	"resent-to":       true,
+	"resent-sender":   true,
 }
 
 func debug(format string, args ...interface{}) {

testdata/mail/qp-utf8-header.raw

@@ -1,6 +1,7 @@
 Message-ID: <5081A889.3020108@jamehi03lx.noa.com>
 Date: Fri, 19 Oct 2012 12:22:49 -0700
-From: James Hillyerd <jamehi03@jamehi03lx.noa.com>
+From: James Hillyerd <jamehi03@jamehi03lx.noa.com>, =?ISO-8859-1?Q?Andr=E9?= Pirard <PIRARD@vm1.ulg.ac.be>
+Sender: =?ISO-8859-1?Q?Andr=E9?= Pirard <PIRARD@vm1.ulg.ac.be>
 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1
 MIME-Version: 1.0
 To: =?UTF-8?Q?Miros=C5=82aw_Marczak?= <marczak@inbucket.com>