Syntax
- func PlainAuth(identity, username, password, host string) Auth
- func SendMail(addr string, a Auth, from string, to []string, msg []byte) error
Sending Email with smtp.SendMail()
Sending email is pretty simple in Go. It helps to understand the RFC 822, which specifies the style an email need to be in, the code below sends a RFC 822 compliant email.
package main
import (
"fmt"
"net/smtp"
)
func main() {
// user we are authorizing as
from := "[email protected]"
// use we are sending email to
to := "[email protected]"
// server we are authorized to send email through
host := "mail.example.com"
// Create the authentication for the SendMail()
// using PlainText, but other authentication methods are encouraged
auth := smtp.PlainAuth("", from, "password", host)
// NOTE: Using the backtick here ` works like a heredoc, which is why all the
// rest of the lines are forced to the beginning of the line, otherwise the
// formatting is wrong for the RFC 822 style
message := `To: "Some User" <[email protected]>
From: "Other User" <[email protected]>
Subject: Testing Email From Go!!
This is the message we are sending. That's it!
`
if err := smtp.SendMail(host+":25", auth, from, []string{to}, []byte(message)); err != nil {
fmt.Println("Error SendMail: ", err)
os.Exit(1)
}
fmt.Println("Email Sent!")
}
The above will send a message like the following:
To: "Other User" <[email protected]>
From: "Some User" <[email protected]>
Subject: Testing Email From Go!!
This is the message we are sending. That's it!
.
