** Address not found **
Your message wasn't delivered to [email protected] because the address couldn't be found, or is unable to receive mail.
Learn more here: https://aka.ms/EXOSmtpErrors
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The response from the remote server was:
550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [BL6PEPF00022570.namprd02.prod.outlook.com 2025-12-17T01:45:58.973Z 08DE3B125C67E6C7]
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Address not found
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Your message wasn't delivered to <a style='color:#212121;text-decoration:none'><b>[email protected]</b></a> because the address couldn't be found, or is unable to receive mail.
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550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [BL6PEPF00022570.namprd02.prod.outlook.com 2025-12-17T01:45:58.973Z 08DE3B125C67E6C7]
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Final-Recipient: rfc822; [email protected]
Action: failed
Status: 5.4.1
Remote-MTA: dns; echo-com.mail.protection.outlook.com. (2a01:111:f403:f901::2,
the server for the domain echo.com.)
Diagnostic-Code: smtp; 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [BL6PEPF00022570.namprd02.prod.outlook.com 2025-12-17T01:45:58.973Z 08DE3B125C67E6C7]
Last-Attempt-Date: Tue, 16 Dec 2025 17:45:58 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=20230601; t=1765935958; x=1766540758; darn=echo.com;
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d=1e100.net; s=20230601; t=1765935958; x=1766540758;
h=to:subject:message-id:date:from:mime-version:x-gm-gg
:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to;
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956f58d0204a3-6455567def5mr11995789d50.97.1765935958201; Tue, 16 Dec 2025
17:45:58 -0800 (PST)
MIME-Version: 1.0
From: Isaac <[email protected]>
Date: Wed, 17 Dec 2025 02:45:46 +0100
X-Gm-Features: AQt7F2ptgW7f65VT62XvmSv0UL49aooxoowzVIh7zTKEeXnUHpW2DQ0s_2vFnv4
Message-ID: <CAAV=Zp1y-fP3td=A1kVkbjNrfFjxCK1Rn0+gf2VtRV=6EWLyaw@mail.gmail.com>
Subject: Doug, a follow-up thought concerning echo's solutions
To: [email protected]
Content-Type: multipart/alternative; boundary="0000000000007c16e506461c0146"