Subject: Mail delivery failed: returning message to sender
From: "Mail Delivery System" <[email-masked]>
To: <[email-masked]>
Date: Thu, 28 Mar 2024 23:54:06 +0330

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]
    host mxs.mail.ru [217.69.139.150]
    SMTP error from remote mail server after end of data:
    550 Message was not accepted -- invalid mailbox.  Local mailbox
[email-masked] is unavailable:
    user not found

Subject: SMTP Check - Jemex Shop
From: "SMTP Check" <[email-masked]>
To: <[email-masked]>
Date: Thu, 28 Mar 2024 23:54:03 +0330

SMTP Check - Jemex Shop