Lowered Go version requirement from 1.5 to 1.2

README.md

@@ -4,7 +4,7 @@
 
 Gomail is a very simple and powerful package to send emails.
 
-It requires Go 1.3 or newer.
+It requires Go 1.2 or newer.
 
 
 ## Features

message.go

@@ -6,7 +6,6 @@ package gomail
 import (
 	"bytes"
 	"io"
-	"mime"
 	"os"
 	"path/filepath"
 	"time"
@@ -20,7 +19,7 @@ type Message struct {
 	embedded    []*File
 	charset     string
 	encoding    Encoding
-	hEncoder    mime.WordEncoder
+	hEncoder    mimeEncoder
 	buf         bytes.Buffer
 }
 
@@ -43,9 +42,9 @@ func NewMessage(settings ...MessageSetting) *Message {
 	m.applySettings(settings)
 
 	if m.encoding == Base64 {
-		m.hEncoder = mime.BEncoding
+		m.hEncoder = bEncoding
 	} else {
-		m.hEncoder = mime.QEncoding
+		m.hEncoder = qEncoding
 	}
 
 	return m
@@ -150,7 +149,7 @@ func (m *Message) FormatAddress(address, name string) string {
 		}
 		m.buf.WriteByte('"')
 	} else if hasSpecials(name) {
-		m.buf.WriteString(mime.BEncoding.Encode(m.charset, name))
+		m.buf.WriteString(bEncoding.Encode(m.charset, name))
 	} else {
 		m.buf.WriteString(enc)
 	}

mime.go

@@ -0,0 +1,19 @@
+// +build go1.5
+
+package gomail
+
+import (
+	"mime"
+	"mime/quotedprintable"
+)
+
+var newQPWriter = quotedprintable.NewWriter
+
+type mimeEncoder struct {
+	mime.WordEncoder
+}
+
+var (
+	bEncoding = mimeEncoder{mime.BEncoding}
+	qEncoding = mimeEncoder{mime.QEncoding}
+)

mime_go14.go

@@ -0,0 +1,16 @@
+// +build !go1.5
+
+package gomail
+
+import "gopkg.in/alexcesaro/quotedprintable.v3"
+
+var newQPWriter = quotedprintable.NewWriter
+
+type mimeEncoder struct {
+	quotedprintable.WordEncoder
+}
+
+var (
+	bEncoding = mimeEncoder{quotedprintable.BEncoding}
+	qEncoding = mimeEncoder{quotedprintable.QEncoding}
+)

writeto.go

@@ -6,7 +6,6 @@ import (
 	"io"
 	"mime"
 	"mime/multipart"
-	"mime/quotedprintable"
 	"path/filepath"
 	"time"
 )
@@ -207,7 +206,7 @@ func (w *messageWriter) writeBody(f func(io.Writer) error, enc Encoding) {
 	} else if enc == Unencoded {
 		w.err = f(subWriter)
 	} else {
-		wc := quotedprintable.NewWriter(subWriter)
+		wc := newQPWriter(subWriter)
 		w.err = f(wc)
 		wc.Close()
 	}