>>> "Andreas" == Andreas Schwab <schwab@linux-m68k.org> writes:

> On Dez 11 2018, Uwe Brauer <oub@mat.ucm.es> wrote:
>> gnutls-cli --insecure -p 587 mail.gmx.de

> This needs an unencrypted connection, then STARTTLS.

>> gnutls-cli --insecure -p 465 mail.gmx.de

> This is encrypted from the start, thus you need to set
> smtpmail-stream-type to 'ssl.

This did not work, however I found out that I am using a quite old
smtpmail.el (I explain below way)
Once I switched to the official one, the following setting worked



      (setq smtpmail-stream-type 'starttls)
      (setq smtpmail-auth-credentials '(("mail.gmx.de" 587 "user" nil)))

However the problem is that I am used very much to feedmail, now
feedmail with the actual smtpmail gives the following error:


,----
| 
| Debugger entered--Lisp error: (error "FQM: Sending...failed")
|   signal(error ("FQM: Sending...failed"))
|   error("FQM: Sending...failed")
|   #f(compiled-function () #<bytecode 0x15e2d05>)()
|   feedmail-send-it-immediately()
|   feedmail-send-it-immediately-wrapper()
|   feedmail-message-action-send()
|   feedmail-send-it()
|   message-multi-smtp-send-mail()
|   gnus-agent-send-mail()
|   message-send-mail(nil)
|   message-send-via-mail(nil)
|   message-send(nil)
|   message-send-and-exit(nil)
|   my-send-with-or-without-link(nil)
|   funcall-interactively(my-send-with-or-without-link nil)
|   call-interactively(my-send-with-or-without-link nil nil)
|   command-execute(my-send-with-or-without-link)
`----

And I have no idea how to debug this, any idea? Anybody using feedmail?