Hello everyone, I do not know what's happening. I have a zohomail account linked to my wgbn.com.br domain in which I use it for personal use.
I've been receiving mesnasgens from "Mail Delivery System" reporting an error in the delivery of some emails. Emails the ones I did not send. The content of these emails are phishing material and links to sites with malicious content.
How can this be happening? How to protect my SMTP account from sending unauthorized out?
The email:
This is the mail system at host server2.hostingforyou.de.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
mx-ha02.web.de[212.227.17.8] said: 550 Requested action not taken: mailbox
unavailable (in reply to RCPT TO command)
Reporting-MTA: dns; server2.hostingforyou.de
X-Postfix-Queue-ID: 0A8C93017D
Arrival-Date: Wed, 17 May 2017 19:11:29 +0200 (CEST)
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx-ha02.web.de
Diagnostic-Code: smtp; 550 Requested action not taken: mailbox unavailable
Received: by server2.hostingforyou.de (Postfix)
id 0A8C93017D; Wed, 17 May 2017 19:11:29 +0200 (CEST)
Received: from [196.216.220.10] (unknown [196.216.220.10])
by server2.hostingforyou.de (Postfix) with ESMTP id 54FA530093
Message-ID: <BDC844433231CF3540CCCBBAB9474A95@GJB6XCI7A>
Subject: 65750
Date: 17 May 2017 16:03:18 -0100
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0025_01D2CF30.07C51283"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2900.5931
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5994