GoLang net / smtp sendMail发送给带有加号的收件人

Question

I am writing a registration form using GoLang 1.5. I have it all working, but I've noticed if I attempt to sign up using an e-mail with a plus sign in it ([e-mail]) I receive the following error:

Transaction failed: Illegal semicolon, not in group

Googling for this hasn't yielded much results, and it seems like Go should handle the plus sign just fine.

import (
  "net/smtp"
  "net/mail"
)

func sendEmail(t *Email) bool {
    to := []string{"[e-mail]"}
    err = smtp.SendMail(smtp_url, auth, from_email, to, buff.Bytes())
    if err != nil {
        log.Fatal(err)
        // outputs: Transaction failed: Illegal semicolon, not in group
    }
}

I appreciate any advice I get on this.

Thanks!

Answer 1

I was able to reproduce this error if and only if I had a semi-colon in the To header within the message body. E.g.:

msg := []byte("To: [e-mail];[e-mail]
Subject: foo

body
")

Double-check the To header you're sending and make sure it uses commas instead of semi-colons to separate multiple recipients.