I have a very basic knowledge of failed delivery notifications. I started to receive the Delivery Subsystem messages, in the early hours of the morning and so far I've had roughly five or six of them.
The first thing that I noticed was that I've no idea who the recipients are, and then I saw that the sender was supposedly me, from my business email address. The common theme with all of these notifications is, Received: from vskyo ([126.96.36.199]) by ds2scotland.com with MailEnable ESMTP; Tue, 11 Oct 2016 07:30:26 +0100.
Below is one of the emails in full.
MailEnable: Message could not be delivered to some recipients.
The following recipient(s) could not be reached:
Reason: Remote SMTP Server Returned: 550 User [firstname.lastname@example.org
] does not exist
Message headers follow:
Received: from vskyo ([188.8.131.52]) by ds2scotland.com with MailEnable ESMTP; Tue, 11 Oct 2016 07:30:26 +0100
Reply-To: "Super Discount Pack" <email@example.com
From: "Super Discount Pack" <firstname.lastname@example.org
Subject: Viagra 100mg + Cialis 20mg FREE
Date: Tue, 11 Oct 2016 08:30:35 +0200
Content-Type: multipart/alternative; boundary="6d1b60e186929d1043bd667a20ea"
I've Googled the company and they seem legit. I changed my email login password yesterday, and I thought that would put a stop to it. It hasn't.
What do I do? This is my business email address and I don't want my clients getting messages, supposedly from me, about Viagra! I've signed NDAs with all of my clients and if it looks to them that my systems have been compromised, then I'm going to lose them.
I would be so grateful if anyone can explain, in simple terms, what is going on and how it's happened/is still happening?