Message

Delivery Status Notification (Failure)

From: Mail Delivery Subsystem <[email protected]>

** 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://community.mimecast.com/docs/DOC-1369#550
(Warning: This link will take you to a third-party site)

The response from the remote server was:
550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [StsB4fV4N1m3qC8T0mF4Ow.us495]


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font-family:Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
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<img style="padding:0 24px 16px 0;float:left" width=72 height=72 alt="Error Icon" src="cid:icon.png">
<table style="min-width:272px;padding-top:8px"><tbody>
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Address not found
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<tr><td style="padding-top:20px;color:#757575;font-size:16px;font-weight:normal;text-align:left">
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.
</td></tr>
<tr><td style="padding-top:24px;color:#4285F4;font-size:14px;font-weight:bold;text-align:left">
<a style="text-decoration:none" href="https://community.mimecast.com/docs/DOC-1369#550">LEARN MORE</a>
</td></tr>
<tr><td style="margin-top:8px;font-style:italic;font-size:12px;color:#757575">
<img style="padding:0 4 0 0;float:left" width=12 height=12 alt="Warning" src="cid:warning_triangle.png">
This link will take you to a third-party site
</td></tr>
</tbody></table>
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</tbody></table>
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<tr style="border:none;background-color:#fff;font-size:12.8px;width:90%">
<td align="left" style="padding:48px 10px">
The response from the remote server was:<br/>
<p style="font-family:monospace">
550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [StsB4fV4N1m3qC8T0mF4Ow.us495]
</p>
</td>
</tr>
</tbody></table>
</body>
</html>

Final-Recipient: rfc822; [email protected]
Action: failed
Status: 5.1.1
Remote-MTA: dns; us-smtp-inbound-1.mimecast.com. (170.10.128.221, the server
 for the domain axis-solar.com.)
Diagnostic-Code: smtp; 550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [StsB4fV4N1m3qC8T0mF4Ow.us495]
Last-Attempt-Date: Tue, 16 Dec 2025 14:17:16 -0800 (PST)

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MIME-Version: 1.0
From: Henry Isaac <[email protected]>
Date: Tue, 16 Dec 2025 23:17:04 +0100
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Message-ID: <CALYcDq3c58ydW2pn7QbiWCn8tNXwpimn-HaYiQDipkKngYdnLw@mail.gmail.com>
Subject: A brief observation for the solar team at axis-solar
To: [email protected]
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