golang smtp使邮件成为希普里或重要

Question

I tried to send a email using golang smtp https://github.com/golang/go/wiki/SendingMail and able to send email properly. Below is the code snippet

func sendEmail(server string) {
// Connect to the server, set the sender and recipient,
// and send the email all in one step.
headers := make(map[string]string)

headers["Subject"] = "Hi-Pri# Server " + server + " down"
headers["From"] = "YYYY@net"
headers["To"] = "XXXX@net"

body := "Hello, Test"

// Setup message
message := ""
for k, v := range headers {
    message += fmt.Sprintf("%s: %s
", k, v)
}
message += "
" + body
err := smtp.SendMail(
    "test.com:25",
    nil,
    "YYYY@net",
    []string{"XXXX@net"},
    []byte(message),
)
if err != nil {
    log.Fatal(err)
}

Im trying to send a hipri mail but couldn't fine the option to make a mail as hirpri or important one. Can someone help me

Answer 1

Add to your code:

headers["X-Priority"] = "1 (Highest)"
headers["X-MSMail-Priority"] = "High"
headers["Importance"] = "High"

That should work. However as said in comments, priority will be interpreted by your client, not your server. Will 100% depends on what your mail client decides to show.