Golang : Send email with attachment

In my previous tutorial on Go's send email and configure SMTP example, I left out a part where any decent email package should have - that is the - email attachment part.

So, how to attach files onto email in Golang ?

After trying to write a decent tutorial to demonstrate this...only then I realized that the codes can be super messy and unreadable. Therefore, I would rather settle for this simple to use third party package https://github.com/scorredoira/email to get this tutorial published. (I'm lazy)

Here it is :

 package main

 import (

 type EmailConfig struct {
 Username string
 Password string
 Host string
 Port int

 func main() {
 // authentication configuration
 smtpHost := "smtp.***.com" // change to your SMTP provider address
 smtpPort := *** // change to your SMPT provider port number
 smtpPass := "****" // change here
 smtpUser := "******" // change here

 emailConf := &EmailConfig{smtpUser, smtpPass, smtpHost, smtpPort}

 emailauth := smtp.PlainAuth("", emailConf.Username, emailConf.Password, emailConf.Host)

 sender := "******@mail.com" // change here

 receivers := []string{
 } // change here

 message := "Please see the email attachment for the images"
 subject := "Attached my photos!"

 emailContent := email.NewMessage(subject, message)

 emailContent.From = sender
 emailContent.To = receivers

 files := []string{
 } // change here to your own files

 for _, filename := range files {
 err := emailContent.Attach(filename)

 if err != nil {

 // send out the email
 err := email.Send(smtpHost+":"+strconv.Itoa(emailConf.Port), //convert port number from int to string

 if err != nil {

Executing this program will not generate any message unless there is error and if everything goes well, you should receive the email with attachment.



  See also : Golang : Send email and SMTP configuration example

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.