smtp

package standard library
go1.22rc2 Latest Latest
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 Go to latest Published: Jan 24, 2024 License: BSD-3-Clause Imports: 10 Imported by: 12,353

Documentation

Overview

Package smtp implements the Simple Mail Transfer Protocol as defined in RFC 5321. It also implements the following extensions: 

8BITMIME  RFC 1652
AUTH      RFC 2554
STARTTLS  RFC 3207

Additional extensions may be handled by clients.

The smtp package is frozen and is not accepting new features. Some external packages provide more functionality. See: 

https://godoc.org/?q=smtp
Example 
package main

import (
	"fmt"
	"log"
	"net/smtp"
)

func main() {
	// Connect to the remote SMTP server.
	c, err := smtp.Dial("mail.example.com:25")
	if err != nil {
		log.Fatal(err)
	}

	// Set the sender and recipient first
	if err := c.Mail("sender@example.org"); err != nil {
		log.Fatal(err)
	}
	if err := c.Rcpt("recipient@example.net"); err != nil {
		log.Fatal(err)
	}

	// Send the email body.
	wc, err := c.Data()
	if err != nil {
		log.Fatal(err)
	}
	_, err = fmt.Fprintf(wc, "This is the email body")
	if err != nil {
		log.Fatal(err)
	}
	err = wc.Close()
	if err != nil {
		log.Fatal(err)
	}

	// Send the QUIT command and close the connection.
	err = c.Quit()
	if err != nil {
		log.Fatal(err)
	}
}

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