On 2022-05-05, Martin McCormick via Exim-users <exim-users@???> wrote:
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>
> Subject: smarthost Outsmarting me so Far
> $ telnet smtp.suddenlink.net 25
you probably need encryption to use authentication.
openssl s_client -connect smtp.suddenlink.net:25 -starttls=smtp
> helo martim.n
Use ESMTP "ehlo" instead of "helo":
EHLO martim.n
> 250 omta03.suddenlink.net
> help login
The help banner doesn't cover auth, the command you want is
AUTH LOGIN
Auth is all in base-64 so you'll need to encode your responses (and
decode the challenges if you can't guess what they are).
> A good perl or python script should plug in to exim's
> logic to make it possible to script and monitor authentication
> and take care of that while exim can do the smtp activities as it
> always has.
>
> Any and all constructive ideas are much appreciated.
> A modular authentication helper would be a tremendous
> force multiplier since security issues have made things much more
> complex then they were and a form of scripting similar to expect
> should reduce the amount of head-banging necessary to solve minor
> changes in authentication that totally stop the show right now.
perl and python already have SMTP libraries just use them, or use
swaks if you're programming in shell.
--
Jasen.
