Subject: Mail delivery failed: returning message to sender

From: [email-masked]
Date: Thu, 15 Jan 2026 21:23:01 +0000 (UTC)

Your email could not be delivered

The following recipient address(es) could not be reached:

* [email-masked]

-------------------------------------------------------------------

Possible reasons:

- There may be a typo in the email address.

- The email address may no longer exist or may no longer be in use.

- The recipient’s mailbox may be full or temporarily unavailable.

- The recipient may have set up email forwarding, which could be
    directing your message to an incorrect address.

-------------------------------------------------------------------

What you can do:

- First, check the recipient’s address carefully for typos.

- If you would like to resend your message to this recipient, please
    enter the email address manually and make sure it is spelt
    correctly. If your email program suggests an address
    automatically, please do not select it.

- The recipient may now be using a different email address. Contact
    them (e.g., by phone or text message) to confirm which address is
    currently valid.

- If delivery is still not possible, inform the recipient so they
    can contact their email provider about the issue.

This message was generated automatically.

-------------------------------------------------------------------

Technical details:

- Error message for [[email-masked]]
    550-Requested action not taken: mailbox unavailable
    550 For explanation visit https://postmaster.gmx.net/en/case?c=r1601&i=ip&
    v=212.227.17.20&r=1MpUlS-1wALMn1oGS-00aqwi

-------------------------------------------------------------------

GMX

This email is an automatically generated message.

Please do not reply to this email. This sender address cannot
receive messages.

Legal notes https://www.gmx.net/impressum/

© 1&1 Mail & Media GmbH

Karlsruhe Branch
Brauerstr. 48, 76135 Karlsruhe, Germany

Management Board: Alexander Charles, Dr. Michael Hagenau,
Thomas Ludwig, Dr. Verena Patzelt

Registered office: Montabaur; registered at the Local Court of
Montabaur (HRB 7666) VAT ID: DE243413002