sa1*_*125 3 email exchange-server go starttls
我正在将一些现有的Python代码移植到Go。一位负责通过Exchange服务器（SMTP + STARTTLS）发送电子邮件。现有的（简化的）代码如下所示：
import smtplib
client = smtplib.SMTP("exchangeserver.com")
client.starttls()
client.login('user', 'password')
client.sendmail('user@exchangeserver.com',
['otheruser1@exchangeserver.com', 'otheruser2@exchangeserver.com'],
'..message..')
我想对Go执行相同的操作，感谢您的帮助-谢谢。
编辑：
这是使用tls连接设置的示例。我没有要测试的设备，因此它在我的连接端失败，但是我怀疑这是您需要使其工作的原因
package main
import (
"crypto/tls"
"fmt"
"log"
"net/smtp"
)
func main() {
var (
host = "smtp.google.com"
port = 587
from = "foo@bar.com"
password = "baz"
to = []string{"bin@bar.com"}
msg = []byte("This is my message")
auth = smtp.PlainAuth("", from, password, "smtp.gmail.com")
)
serverAddr := fmt.Sprintf("%s:%d", host, port)
conn, err := tls.Dial("tcp", serverAddr, nil)
if err != nil {
log.Printf("Error Dialing %s\n", err)
return
}
client, err := smtp.NewClient(conn, host)
if err != nil {
log.Printf("Error SMTP connection: %s\n", err)
return
}
if ok, _ := client.Extension("AUTH"); ok {
if err := client.Auth(auth); err != nil {
log.Printf("Error during AUTH %s\n", err)
return
}
}
if err := client.Mail(from); err != nil {
log.Printf("Error: %s\n", err)
return
}
for _, addr := range to {
if err := client.Rcpt(addr); err != nil {
log.Printf("Error: %s\n", err)
return
}
}
w, err := client.Data()
if err != nil {
log.Printf("Error: %s\n", err)
return
}
_, err = w.Write(msg)
if err != nil {
log.Printf("Error: %s\n", err)
return
}
err = w.Close()
if err != nil {
log.Printf("Error: %s\n", err)
return
}
client.Quit()
}
我认为类似的方法可能会起作用。您必须对服务器，用户/密码等进行适当的更改。如果您需要更多帮助，请告诉我。
package main
import (
"fmt"
"log"
"net/smtp"
)
func main() {
to := "foo@foo.com"
from := "bin@baz.com"
password := "myPassword"
subject := "subject line of email"
msg := "a one-line email message"
emailTemplate := `To: %s
Subject: %s
%s
`
body := fmt.Sprintf(emailTemplate, to, subject, msg)
auth := smtp.PlainAuth("", from, password, "smtp.gmail.com")
err := smtp.SendMail(
"smtp.gmail.com:587",
auth,
from,
[]string{to},
[]byte(body),
)
if err != nil {
log.Fatal(err)
}
}
要扩展Cory LaNou的答案，可以在normal上使用StartTLS net.Conn。您需要定义一个tls.Config，然后使用它来升级连接以使用TLS。
以下示例基于Cory的答案，还从crypto / tls测试文件中窃取了一些代码以创建RSA证书和私钥。在生产中，您显然会用真实的证书和密钥来代替它们。
它可能需要对变量进行一些自定义，以及对进行一些更改tls.Config以适合您的环境。
package main
import (
"crypto/rsa"
"crypto/tls"
"encoding/hex"
"fmt"
"log"
"math/big"
"net"
"net/smtp"
)
func main() {
var (
host = "smtp.myexchange.com"
port = 587
from = "sender@example.org"
password = "password"
to = []string{"recipient@example.org"}
msg = []byte("This is my message")
auth = smtp.PlainAuth("", from, password, "smtp.myexchange.com")
)
conf := new(tls.Config)
conf.Certificates = make([]tls.Certificate, 1)
conf.Certificates[0].Certificate = [][]byte{testRSACertificate}
conf.Certificates[0].PrivateKey = testRSAPrivateKey
conf.CipherSuites = []uint16{tls.TLS_RSA_WITH_RC4_128_SHA}
conf.InsecureSkipVerify = true
conf.MinVersion = tls.VersionSSL30
conf.MaxVersion = tls.VersionTLS10
serverAddr := fmt.Sprintf("%s:%d", host, port)
conn, err := net.Dial("tcp", serverAddr)
if err != nil {
log.Printf("Error Dialing %s\n", err)
return
}
client, err := smtp.NewClient(conn, host)
if err != nil {
log.Printf("Error SMTP connection: %s\n", err)
return
}
if err = client.StartTLS(conf); err != nil {
log.Printf("Error performing StartTLS: %s\n", err)
return
}
if ok, _ := client.Extension("AUTH"); ok {
if err := client.Auth(auth); err != nil {
log.Printf("Error during AUTH %s\n", err)
return
}
}
if err := client.Mail(from); err != nil {
log.Printf("Error: %s\n", err)
return
}
for _, addr := range to {
if err := client.Rcpt(addr); err != nil {
log.Printf("Error: %s\n", err)
return
}
}
w, err := client.Data()
if err != nil {
log.Printf("Error: %s\n", err)
return
}
_, err = w.Write(msg)
if err != nil {
log.Printf("Error: %s\n", err)
return
}
err = w.Close()
if err != nil {
log.Printf("Error: %s\n", err)
return
}
client.Quit()
}
// Code below from http://golang.org/src/pkg/crypto/tls/handshake_server_test.go
func bigFromString(s string) *big.Int {
ret := new(big.Int)
ret.SetString(s, 10)
return ret
}
func fromHex(s string) []byte {
b, _ := hex.DecodeString(s)
return b
}
var testRSACertificate = fromHex("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")
var testRSAPrivateKey = &rsa.PrivateKey{
PublicKey: rsa.PublicKey{
N: bigFromString("131650079503776001033793877885499001334664249354723305978524647182322416328664556247316495448366990052837680518067798333412266673813370895702118944398081598789828837447552603077848001020611640547221687072142537202428102790818451901395596882588063427854225330436740647715202971973145151161964464812406232198521"),
E: 65537,
},
D: bigFromString("29354450337804273969007277378287027274721892607543397931919078829901848876371746653677097639302788129485893852488285045793268732234230875671682624082413996177431586734171663258657462237320300610850244186316880055243099640544518318093544057213190320837094958164973959123058337475052510833916491060913053867729"),
Primes: []*big.Int{
bigFromString("11969277782311800166562047708379380720136961987713178380670422671426759650127150688426177829077494755200794297055316163155755835813760102405344560929062149"),
bigFromString("10998999429884441391899182616418192492905073053684657075974935218461686523870125521822756579792315215543092255516093840728890783887287417039645833477273829"),
},
}