golang：从smtp.SendMail读取多行错误响应

I am using this code:

err := smtp.SendMail(
    smtpHostPort,
    auth,
    sender,
    []string{recipient},
    []byte(message),
)
if err != nil {
    log.Printf("sendSmtp: failure: %q", strings.Split(err.Error(), "
"))
}

However the multiline error response seems truncated:

 2013/02/06 11:54:41 sendSmtp: failure: ["530 5.5.1 Authentication Required. Learn more at"]

How can I get the full multiline error response?

For the records, this bug has been fixed:

https://code.google.com/p/go/issues/detail?id=5700

The error is not a multi-line string.

package main

import (
    "errors"
    "log"
    "strings"
)

func main() {
    err := errors.New("530 5.5.1 Authentication Required. Learn more at")
    log.Printf("sendSmtp: failure: %q", strings.Split(err.Error(), "
"))
    err = errors.New("530 5.5.1 Authentication Required. Learn more at
stackoverflow.com")
    log.Printf("sendSmtp: failure: %q", strings.Split(err.Error(), "
"))
}

Output:

2013/02/06 13:30:19 sendSmtp: failure: ["530 5.5.1 Authentication Required. Learn more at"]
2013/02/06 13:30:19 sendSmtp: failure: ["530 5.5.1 Authentication Required. Learn more at" "stackoverflow.com"]