How to send an email with attachments in Go

Question

I have found this library and have managed to send an attachment in an empty email but not to combine text and attachments.

https://github.com/sloonz/go-mime-message

How can it be done?

Answer 1

I ended up implementing it myself: https://github.com/scorredoira/email

Usage is very simple:

m := email.NewMessage("Hi", "this is the body")
m.From = "[email protected]"
m.To = []string{"[email protected]"}

err := m.Attach("picture.png")
if err != nil {
    log.Println(err)
}

err = email.Send("smtp.gmail.com:587", smtp.PlainAuth("", "user", "password", "smtp.gmail.com"), m)

Answer 2

I created gomail for this purpose. It supports attachments as well as multipart emails and encoding of non-ASCII characters. It is well documented and tested.

Here is an example:

package main

func main() {
    m := gomail.NewMessage()
    m.SetHeader("From", "[email protected]")
    m.SetHeader("To", "[email protected]", "[email protected]")
    m.SetAddressHeader("Cc", "[email protected]", "Dan")
    m.SetHeader("Subject", "Hello!")
    m.SetBody("text/html", "Hello <b>Bob</b> and <i>Cora</i>!")
    m.Attach("/home/Alex/lolcat.jpg")

    d := gomail.NewPlainDialer("smtp.example.com", 587, "user", "123456")

    // Send the email to Bob, Cora and Dan.
    if err := d.DialAndSend(m); err != nil {
        panic(err)
    }
}