Erroneous marketing email

I use a unique email address for every account I create on the web. I just received spam email to the unique email address I used when creating my hologram.io account:

============================================================
Dear Friend,

We are pleased to inform you that you have been accepted at Hogwarts School of Witchcraft and Wizardry. Please find enclosed a list of all necessary books and equipment. Term begins on September 1. We await your owl by no later than July 31.

Yours sincerely,
Minerva McGonagall
Deputy Headmistress

mktomail.com and marketo.org appear in the headers. I clipped out most of the headers and this board won’t let me post them all “new users can only put 2 links in a post”:

Return-Path: <hologram@hologram.io>
X-MSFBL: aG9sb2dyYW0uaW9Aam9zaGhpZ2hsZXkuY29tQGR2cC0xOTktMTUtMjE0LTQ4QGJn LXNqLTAxQDAyNC1ZRFgtMzcyOjQ3OjEwMzg6Mjc6MDozOjk6MTcwOjE1MTMy
Received: from [10.0.87.249] ([10.0.87.249:59845] helo=sjmas01.marketo.org) by sjmta16.marketo.org (envelope-from <hologram@hologram.io>) (ecelerity 3.6.8.47404 r(Core:3.6.8.0)) with ESMTP id 96/91-04010-EA9B35A5; Mon, 08 Jan 
Date: Mon, 8 Jan 2018 12:34:22 -0600 (CST)
From: Mike Ryan <hologram@hologram.io>
Reply-To: hologram@hologram.io
To: [clipped my email]
Message-ID: <985320679.-611382981.1515436462261.JavaMail.root@sjmas01.marketo.org>
Subject: We are so happy to have you on board!
MIME-Version: 1.0
X-MarketoID: 024-YDX-372:47:1038:27:0:3:9:170:15132
X-MktArchive: false
X-MktMailDKIM: true

I just received the same email. I don’t like how many services hologram has been associating with my email without my consent.

Same here.

Hi everyone! Chris from DevRel here. We had a bit of a snafu with a marketing plugin this morning.

We have checked on the error and nothing has been shared externally, it just triggered a WEIRD test email. We’re sorry about that! We’ll be sending an email response soon. THANK YOU for letting us know!

You should have also seen a response via email, but we updated our official thread here: January 8th erroneous marketing email update - #2

Thanks again to those who let us know about this issue right away.