It sounds like lists.openser.org <http://lists.openser.org/> has been retired. Are you sending there, or to users@lists.kamailio.org <mailto:users@lists.kamailio.org>?

> On Jul 9, 2025, at 11:55 AM, David Villasmil via sr-users <sr-users@lists.kamailio.org> wrote:
>
> i'm seeing this for some reason, anyone knows why?
>
> Regards,
>
> David Villasmil
> email: david.villasmil.work@gmail.com
>
>
>
> On Wed, Jul 9, 2025 at 3:34 PM Mail Delivery Subsystem <mailer-daemon@googlemail.com> wrote:
> <icon.png> Delivery incomplete
> There was a temporary problem delivering your message to users@lists.openser.org. Gmail will retry for 21 more hours. You'll be notified if the delivery fails permanently.
> The response from the remote server was:
> 454 4.7.1 : Relay access denied
>
>
>
> ---------- Forwarded message ----------
> From: David Villasmil <david.villasmil.work@gmail.com>
> To: "Kamailio (SER) - Users Mailing List" <sr-users@lists.kamailio.org>, openser users <users@lists.openser.org>
> Cc:
> Bcc:
> Date: Mon, 7 Jul 2025 12:44:38 +0200
> Subject: Stir/Shaken
> Hello,
>
> I've seen people wondering how to implement Stir/shaken on Kamailio and OpenSIPS. It occurred to me that making a docker image would help a lot of people so I did. You can find it in https://hub.docker.com/repository/docker/davidcsi/kamailio-stirshaken/general and in the description you can read how it works and how to use it.
>
> Hope it helps!
>
> David Villasmil
> email: david.villasmil.work@gmail.com
>
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