Mailenable - Message Delivery Failure

[Flaterik]

De laatste tijd krijg ik veel "Message Delivery Failure" mailtjes in mijn mailbox.
Opzich niet een ramp maar vandaag waren het er 1300. In een server log zag ik er nog zo'n 20.000 staan Op deze manier komen normale mails dus niet of vertraagd aan.
Er staat echter in deze mailtjes geen nuttige info om te achterhalen wie dit verstuurd heeft. Wel komt ik vaak 127.0.0.1 tegen. De mails worden dus verzonden van onze server?
Weet iemand wat hier tegen te doen is?
Een voorbeeld van 1 van de emails:

MailEnable: Message could not be delivered to some recipients.
The following recipient(s) could not be reached:

Recipient: [SMTP:[e-mail]]
Reason: Remote SMTP Server Returned: 550 Invalid recipient: <[e-mail]>

Message headers follow:

Received: from ([127.0.0.1]) with MailEnable ESMTP; Wed, 27 Sep 2006 04:30:16 +0200
Date: Wed, 27 Sep 2006 04:30:16 Ä0100
Subject: WE SINCERELY APOLOGIES FOR THE DELAY
To: [e-mail]
From: ECO BANK PLC. <[e-mail]>
Reply-To: [e-mail]
MIME-Version: 1.0
Content-Type: text/plain
Content-Transfer-Encoding: 8bit
ECO BANK INTERNATIONAL REMITTANCE DEPARTMENT
CORPORATE HEAD QUARTERS.
LAGOS NIGERIA.
DIRECT PHONE: [phone] Good day,
We write to acknowledge the receipt of your mail and the content was duly noted.We Apologies, for the delay of your payment and all the Inconveniences and Inflict that we might have indulge you through. However, we were having some minor problems with our payment system, which is Inexplicable, and have held us stranded and Indolent, not having the Aspiration to devote our 100% Assiduity in accrediting foreign payments.

From the records of outstanding contractors due for payment with the Federal Government of Nigeria.Your name was discovered as next on the list of the outstanding contractors who have not received their payments.We are thereby mandated to immediately remit the long overdue accrued interest of your US$ 3.5 Million to your desired bank account. I wish to inform you now that the square peg is now in square whole and can be voguish for that your payment is being processed and will be released to you as soon as you respond to this letter.

- Long messege edit -

Message-ID: <[e-mail]>