diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..5ada25c
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,24 @@
+name: build
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: ["1.19","1.20"]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+
+      - name: Set up Golang ${{ matrix.go-version }}
+        uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+        id: go
+
+      - name: Test
+        env:
+          TZ: Asia/Shanghai
+        run: |
+          make test
+          bash <(curl -s https://codecov.io/bash) -t ${{ secrets.CODECOV_TOKEN}}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..78f591a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,23 @@
+### Go template
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 48915e7..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-language: go
-
-go:
-  - 1.2
-  - 1.3
-  - 1.4
-  - 1.5
-  - 1.6
-  - tip
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e282a75
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,38 @@
+GO ?= go
+GOFMT ?= gofmt "-s"
+GOFILES := $(shell find . -name "*.go" -type f -not -path "./vendor/*")
+VETPACKAGES ?= $(shell $(GO) list ./... | grep -v /vendor/ | grep -v /examples/)
+
+.PHONY: build
+build: fmt-check
+	$(GO) build -o app main.go
+
+.PHONY: test
+test:
+	$(GO) test -v -coverprofile=cover.out ./...
+
+.PHONY: cover
+cover:
+	$(GO) tool cover -func=cover.out -o cover_total.out
+	$(GO) tool cover -html=cover.out -o cover.html
+
+.PHONY: fmt
+fmt:
+	$(GOFMT) -w $(GOFILES)
+
+.PHONY: fmt-check
+fmt-check:
+	@diff=$$($(GOFMT) -d $(GOFILES)); \
+	if [ -n "$$diff" ]; then \
+		echo "Please run 'make fmt' and commit the result:"; \
+		echo "$${diff}"; \
+		exit 1; \
+	fi; \
+	echo "\033[34m[Code] format perfect!\033[0m";
+
+vet:
+	$(GO) vet $(VETPACKAGES)
+
+.PHONY: lint
+lint:
+	golangci-lint run
diff --git a/README.md b/README.md
index b3be9e1..f49966c 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Gomail
-[![Build Status](https://travis-ci.org/go-gomail/gomail.svg?branch=v2)](https://travis-ci.org/go-gomail/gomail) [![Code Coverage](http://gocover.io/_badge/gopkg.in/gomail.v2)](http://gocover.io/gopkg.in/gomail.v2) [![Documentation](https://godoc.org/gopkg.in/gomail.v2?status.svg)](https://godoc.org/gopkg.in/gomail.v2)
+[![build](https://github.com/verystar/gomail/actions/workflows/build.yml/badge.svg)](https://github.com/verystar/gomail/actions/workflows/build.yml)
+
+Fork https://github.com/go-gomail/gomail
 
 ## Introduction
 
diff --git a/example_test.go b/example_test.go
index 90008ab..da5d652 100644
--- a/example_test.go
+++ b/example_test.go
@@ -7,7 +7,7 @@ import (
 	"log"
 	"time"
 
-	"gopkg.in/gomail.v2"
+	"github.com/verystar/gomail"
 )
 
 func Example() {
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..dccfc34
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/verystar/gomail
+
+go 1.17
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..e69de29
diff --git a/mime.go b/mime.go
index 194d4a7..cdaa349 100644
--- a/mime.go
+++ b/mime.go
@@ -1,5 +1,3 @@
-// +build go1.5
-
 package gomail
 
 import (
diff --git a/mime_go14.go b/mime_go14.go
deleted file mode 100644
index 3dc26aa..0000000
--- a/mime_go14.go
+++ /dev/null
@@ -1,25 +0,0 @@
-// +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}
-	lastIndexByte = func(s string, c byte) int {
-		for i := len(s) - 1; i >= 0; i-- {
-
-			if s[i] == c {
-				return i
-			}
-		}
-		return -1
-	}
-)