Subject: Mail delivery failed: returning message to sender
From: Mail Delivery System <[email-masked]>
To: [email-masked]
Date: Wed, 26 Oct 2022 20:49:44 +0100

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email-masked]
    mailbox is full: retry timeout exceeded