Change behavior of AddTo and update version

README.md

@@ -2,6 +2,10 @@
 [![Build Status](https://travis-ci.org/sendgrid/sendgrid-go.svg?branch=master)](https://travis-ci.org/sendgrid/sendgrid-go)
 SendGrid Helper Library to send emails very easily using Go.
 
+### Warning
+
+Version ``1.1.x``, behaves differently in the ``AddTo`` method. In the past this method defaulted to using the ``SMTPAPI`` header. Now you must explicitly call the ``SMTPAPIHeader.AddTo`` method. More on the ``SMTPAPI`` section.
+
 ## Installation
 
 ```bash
@@ -101,12 +105,12 @@ If you wish to use the X-SMTPAPI on your own app, you can use the [SMTPAPI Go li
 ### Recipients
 
 ```go
-message.AddTo("addTo@mailinator.com")
+message.SMTPAPIHeader.AddTo("addTo@mailinator.com")
 // or
 tos := []string{"test@test.com", "test@email.com"}
-message.AddTos(tos)
+message.SMTPAPIHeader.AddTos(tos)
 // or
-message.SetTos(tos)
+message.SMTPAPIHeader.SetTos(tos)
 ```
 
 ### [Substitutions](http://sendgrid.com/docs/API_Reference/SMTP_API/substitution_tags.html)

mail.go

@@ -2,11 +2,12 @@ package sendgrid
 
 import (
 	"encoding/json"
-	"github.com/sendgrid/smtpapi-go"
 	"io"
 	"io/ioutil"
 	"net/mail"
 	"time"
+
+	"github.com/sendgrid/smtpapi-go"
 )
 
 // SGMail is representation of a valid SendGrid Mail
@@ -55,7 +56,6 @@ func (m *SGMail) AddTos(emails []string) error {
 
 // AddRecipient will add mail.Address emails to recipients.
 func (m *SGMail) AddRecipient(recipient *mail.Address) {
-	m.SMTPAPIHeader.AddTo(recipient.String())
 	m.To = append(m.To, recipient.Address)
 	if recipient.Name != "" {
 		m.ToName = append(m.ToName, recipient.Name)

mail_test.go

@@ -24,8 +24,6 @@ func TestAddTo(t *testing.T) {
 		t.Errorf("AddTo should append to SGMail.To")
 	case len(m.ToName) != 1:
 		t.Errorf("AddTo should append to SGMail.ToName on a valid email")
-	case len(m.SMTPAPIHeader.To) != 1:
-		t.Errorf("AddTo should also modify the SMTPAPIHeader.To")
 	}
 }
 
@@ -65,8 +63,6 @@ func TestAddRecipients(t *testing.T) {
 		t.Errorf("AddRecipients should append to SGMail.To")
 	case len(m.ToName) != 2:
 		t.Errorf("AddRecipients should append to SGMail.ToName if a valid email is supplied")
-	case len(m.SMTPAPIHeader.To) != 2:
-		t.Errorf("AddRecipients should append to SMTPAPIHeader.To")
 	}
 }
 
@@ -321,3 +317,11 @@ func TestHeaderString(t *testing.T) {
 		t.Errorf("Error parsing headers: %v", err)
 	}
 }
+
+func TestAddToSMTPAPI(t *testing.T) {
+	m := NewMail()
+	m.SMTPAPIHeader.AddTo("example@email.com")
+	if len(m.SMTPAPIHeader.To) != 1 {
+		t.Error("SMTPAPIHeader To should be len of 1")
+	}
+}

sendgrid.go

@@ -11,7 +11,7 @@ import (
 	"time"
 )
 
-const Version = "1.0.0"
+const Version = "1.1.0"
 
 func timeoutHandler(network, address string) (net.Conn, error) {
 	return net.DialTimeout(network, address, time.Duration(5*time.Second))