اتصال به ایمیل‌سرور در برنامه‌های go

go get gopkg.in/gomail.v2

MAIL_HOST=smtp.c1.liara.email
MAIL_PORT=465
MAIL_USER=cranky_galileo_nhh78l
MAIL_PASSWORD=7ae28d03-2e09-4211-8e79-c3a54ae5798e
MAIL_FROM=info@example.com

package main

import (
	"fmt"
	"log"
	"os"
	"strconv"
	gomail "gopkg.in/mail.v2"
)

func main() {
	// Fetch environment variables
	host := os.Getenv("MAIL_HOST")

	port, err := strconv.Atoi(os.Getenv("MAIL_PORT"))
	if err != nil {
        panic(err)
	}

	user := os.Getenv("MAIL_USER")
	password := os.Getenv("MAIL_PASSWORD")
	from := os.Getenv("MAIL_FROM")

	// Define the email recipient, subject, and body
	to := "recipient@example.com"
	subject := "Test Email"
	body := "This is a test email."

	// Set up the email message
	msg := gomail.NewMessage()
	msg.SetHeader("From", from)
	msg.SetHeader("To", to)
	msg.SetHeader("Subject", subject)
	msg.SetHeader("x-liara-tag", "test-tag")
	msg.SetBody("text/plain", body)

	// Set up the SMTP client 
	dialer := gomail.NewDialer(host, port, user, password)
	dialer.SSL = true // force SSL

	// Send the email
	err = dialer.DialAndSend(msg)
	if err != nil {
		log.Fatalf("Failed to send email: %s", err)
	} else {
		fmt.Println("Email sent successfully!")
	}
}