Subject: Mail delivery failed: returning message to sender
From: Mail Delivery System <[email-masked]>
To: <[email-masked]>
Date: Thu, 25 Sep 2025 11:18:16 +0300

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]
    Domain rajmetals.co.ke has exceeded the max defers and failures per hour (764/300 (70%)) allowed. Message discarded.

Subject: Testing
From: test <[email-masked]>
To: <[email-masked]>
Date: Thu, 25 Sep 2025 08:18:14 +0000

hi