This is a working example (except, of course, that it does not include an
actual email account or password, and, for Gmail in particular, you need to
take extra steps to enable plain SMTP):
#lang racket

(require net/smtp
         net/head
         openssl)

(let ([to "y...@example.com"]
      [from "m...@gmail.com"])
  (smtp-send-message
   "smtp.gmail.com"
   #:port-no 465
   #:auth-user from
   #:auth-passwd "my-password"
   #:tcp-connect ssl-connect
   from
   (list to)
   (insert-field "Subject" "net/smpt example email"
                 (insert-field "From" from
                               (insert-field "To" to
                                             empty-header)))
   '("This is an example message."
     "It is on multiple lines.")))

The example you attached includes several syntax errors, especially
relating to keyword arguments. You may find this section from The Racket
Guide helpful:
http://docs.racket-lang.org/guide/application.html#%28part._keyword-args%29

I will also note that I often use net/sendmail instead of net/smtp:
http://docs.racket-lang.org/net/sendmail.html

-Philip

On Fri, Jan 19, 2018 at 3:57 AM, MHE <werb...@hans-schueren.de> wrote:

> Hello ,
>
> i want to send a email with  net/smtp.
>
> Have attached a file with the code.
>
> May i ask for a working code example of net/smtp ?
>
> That would help a lot.
>
> WBR
> MHE
>
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