在格朗使用 Smtp 发送电子邮件
原文:https://www . geesforgeks . org/sensing-email-use-SMTP-in-golang/
net/smtp 是内置的 go 包，实现 smtp 协议。它提供了一种通过 smtp 服务器发送邮件的简单方法。这个包实现了简单邮件传输协议。
发送邮件的步骤:
1。从主机服务器获得身份验证，并使用 PlainAuth 功能建立到主机服务器的 TLS 连接。
func PlainAuth(identity, username, password, host string) Auth
PlainAuth 接受字符串类型标识(它应该是一个空字符串来充当用户名)、用户名(发件人邮件地址)、密码(发件人邮件密码)和 SMTP 服务器端口的四个参数。PlainAuth 返回一个 Auth，一个 SMTP 身份验证机制的实现。为了向主机进行身份验证，返回的身份验证使用给定的用户名和密码，并充当身份。
2。使用获得的授权，通过发送邮件功能发送邮件
func SendMail(addr string, a Auth, from string, to []string, msg []byte) error
SendMail 函数接受五个参数。addr 的类型是 string，包含服务器的地址和端口号(例如:“smtp.gmail.com:587”)，a 是我们从 PlainAuth 函数获得的 Auth，from 是 string 类型，包含发件人邮件地址，to 是包含收件人邮件地址的字符串片段，msg 是包含邮件正文的字节片段。
这里我们使用 Gmail 服务器发送邮件。您可以使用任何域的邮件地址，只需相应地更改主机即可。
去
// Sending Email Using Smtp in Golang
package main
import (
"fmt"
"net/smtp"
"os"
)
// Main function
func main() {
// from is senders email address
// we used environment variables to load the
// email address and the password from the shell
// you can also directly assign the email address
// and the password
from := os.Getenv("MAIL")
password := os.Getenv("PASSWD")
// toList is list of email address that email is to be sent.
toList := []string{"example@gmail.com"}
// host is address of server that the
// sender's email address belongs,
// in this case its gmail.
// For e.g if your are using yahoo
// mail change the address as smtp.mail.yahoo.com
host := "smtp.gmail.com"
// Its the default port of smtp server
port := "587"
// This is the message to send in the mail
msg := "Hello geeks!!!"
// We can't send strings directly in mail,
// strings need to be converted into slice bytes
body := []byte(msg)
// PlainAuth uses the given username and password to
// authenticate to host and act as identity.
// Usually identity should be the empty string,
// to act as username.
auth := smtp.PlainAuth("", from, password, host)
// SendMail uses TLS connection to send the mail
// The email is sent to all address in the toList,
// the body should be of type bytes, not strings
// This returns error if any occured.
err := smtp.SendMail(host+":"+port, auth, from, toList, body)
// handling the errors
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Successfully sent mail to all user in toList")
}
输出:
Successfully sent mail to all user in toList
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