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Golang StartTLS SMTP Example
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package main | |
import ( | |
"fmt" | |
"log" | |
"net" | |
"net/mail" | |
"net/smtp" | |
"crypto/tls" | |
) | |
// StartTLS Email Example | |
func main() { | |
from := mail.Address{"", "username@example.tld"} | |
to := mail.Address{"", "username@anotherexample.tld"} | |
subj := "This is the email subject" | |
body := "This is an example body.\n With two lines." | |
// Setup headers | |
headers := make(map[string]string) | |
headers["From"] = from.String() | |
headers["To"] = to.String() | |
headers["Subject"] = subj | |
// Setup message | |
message := "" | |
for k,v := range headers { | |
message += fmt.Sprintf("%s: %s\r\n", k, v) | |
} | |
message += "\r\n" + body | |
// Connect to the SMTP Server | |
servername := "smtp.example.tld:465" | |
host, _, _ := net.SplitHostPort(servername) | |
auth := smtp.PlainAuth("","username@example.tld", "password", host) | |
// TLS config | |
tlsconfig := &tls.Config { | |
InsecureSkipVerify: true, | |
ServerName: host, | |
} | |
c, err := smtp.Dial(servername) | |
if err != nil { | |
log.Panic(err) | |
} | |
c.StartTLS(tlsconfig) | |
// Auth | |
if err = c.Auth(auth); err != nil { | |
log.Panic(err) | |
} | |
// To && From | |
if err = c.Mail(from.Address); err != nil { | |
log.Panic(err) | |
} | |
if err = c.Rcpt(to.Address); err != nil { | |
log.Panic(err) | |
} | |
// Data | |
w, err := c.Data() | |
if err != nil { | |
log.Panic(err) | |
} | |
_, err = w.Write([]byte(message)) | |
if err != nil { | |
log.Panic(err) | |
} | |
err = w.Close() | |
if err != nil { | |
log.Panic(err) | |
} | |
c.Quit() | |
} |
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