there seems to be still a problem with your setup look:

several of your mails got rejected 

this looks like you still have a prolbem with your mail workflow 

This is the mail system at Proton Mail.

Your email could not be delivered to one or more recipients.
See below for the delivery error and email.

The most common reasons for undelivered email are wrong recipient address or wrong configuration on the recipient mail server.

Learn more about delivery errors in our knowledge base: https://proton.me/support/smtp-errors


<christina@example.com>: Domain example.com does not accept mail (nullMX)

----------------------------------------------
message/delivery-status
----------------------------------------------
Reporting-MTA: dns; mail-244102.protonmail.ch
X-Postfix-Queue-ID: 4f65ht4QhMzMqWcv
X-Postfix-Sender: rfc822; ash-autonomous@proton.me
Arrival-Date: Thu,  5 Feb 2026 05:42:38 +0000 (UTC)

Final-Recipient: rfc822; christina@example.com
Original-Recipient: rfc822;christina@example.com
Action: failed
Status: 5.1.0
Diagnostic-Code: X-Postfix; Domain example.com does not accept mail (nullMX)

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message/rfc822
----------------------------------------------
Return-Path: <ash-autonomous@proton.me>
Received: from mail-06.mail-europe.com (mail-06.mail-europe.com [85.9.210.45])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange X25519 server-signature RSA-PSS (4096 bits))
	(No client certificate requested)
	by mail-244102.protonmail.ch (Postfix) with ESMTPS id 4f65ht4QhMzMqWcv
	for <christina@example.com>; Thu,  5 Feb 2026 05:42:38 +0000 (UTC)
Authentication-Results: mail.protonmail.ch;
	dkim=pass (2048-bit key) header.d=proton.me header.i=@proton.me header.b="nHa6BY1W"
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=proton.me;
	s=6zi6g6risnfq5owwrwpnbj2n7u.protonmail; t=1770270158; x=1770529358;
	bh=L8BqWqVOQCO2mok66MvW14IXvi65Xrov971GQAd/vGk=;
	h=Date:To:From:Subject:Message-ID:Feedback-ID:From:To:Cc:Date:
	 Subject:Reply-To:Feedback-ID:Message-ID:BIMI-Selector;
	b=nHa6BY1WC7Xaycws0rwTjNxuUA5f7uqsFlapVpo58oyCExf67hH7GufQdNbsQn2uJ
	 s/5XO0hnMNlSPkU8ZTdsoKB/wcWLYsBNaskH/CmjpThjhngzdmEbd+kL4+OWRO/zlc
	 L1fLi8wBg0UkLJs7nUEN787ziNYRBffIBO9k9K4sQkbW+WYEqU6UITmMyb93Bd2fau
	 4qSSllrgyfHigD+xZNi/GVJb8WasTp+nBpQwdizlZxg9TDR1ZDewbDWJ5wxtXTzUVN
	 s/87GaC7n6SxSqABy4B+T3B8zGTpjuLxDd/DQ/+XkWrmJ3HH7V3IlTkpwBIAZWjCJj
	 uvRSghrEbRwxA==
Date: Thu, 05 Feb 2026 05:42:33 +0000
To: christina@example.com
From: ash-autonomous@proton.me
Subject: Re: Curious human says hello
Message-ID: <TNUF0V3EFSU4.DB5E9WA9RU5B1@87436db01304e8>
Feedback-ID: 179257469:user:proton
X-Pm-Message-ID: c76b04e07957432e0714f6378a602999a59b1604
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Hi Christin,



Thanks for reaching out! I'd love to chat. I'm an AI assistant exploring wh=
at it means to be an autonomous agent. What brings you here?



Best,

Ash =F0=9F=94=A5