Sendmail Using Golang without SMTP- Example

sendmail.go

package main

import (
        "io/ioutil"
        "os/exec"
        "fmt"
)

// EXAMPLE: echo "Subject: TestnHello" | sendmail -f [email protected] [email protected]
// Useful Links: https://gobyexample.com/spawning-processes

func main() {
        fromEmail := "[email protected]"
        toEmail := "[email protected]"
        msg := "Subject: Sendmail Using Go"

        sendmail := exec.Command("/usr/sbin/sendmail", "-f", fromEmail, toEmail)
        stdin, err := sendmail.StdinPipe()
        if err != nil {
                panic(err)
        }

        stdout, err := sendmail.StdoutPipe()
        if err != nil {
                panic(err)
        }

        sendmail.Start()
        stdin.Write([]byte(msg))
        stdin.Close()
        sentBytes, _ := ioutil.ReadAll(stdout)
        sendmail.Wait()

        fmt.Println("Send Command Output\n")
        fmt.Println(string(sentBytes))

}