Received a "Complete your DropBox setup" e-mail out of nowhere

This is the complete e-mail source.  I've only masked my own e-mail address, but it did arrive at the address I've registered to DropBox.  Everything about this looks to me like it really did come from DropBox.  No idea what triggered it to think I've just registered for a new DropBox account.  The links in the message do actually point to DropBox.

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MIME-Version: 1.0
From: Dropbox <no-reply@dropbox.com>
To: PRIVATE@gmail.com
CC:
Subject: Complete your Dropbox setup
Date: Mon, 8 Oct 2018 11:12:58 +0000
Message-ID: <0100016653614f10-680e5535-7a02-4f9f-9511-7ddebd561ab7-000000@email.amazonses.com>
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Feedback-ID: 1.us-east-1.syWQ1+fF8Wo1tY8y/+s85ptiAKu7bILK6PHyxwpB+xo=:AmazonSES

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Take your Dropbox to the next level
Good things happen when your stuff lives in Dropbox: your files are safe, =
synced, and easy to share.=20
Get the most out of your Dropbox by completing these steps:=20
Complete the next step[1]

Questions? Check out our help center[2] or Community[3] for answers to freq=
uently asked questions.

____________________________________________________
Want to stop getting tips from Dropbox? Unsubscribe[4]
Dropbox, Inc., PO Box 77767, San Francisco, CA 94107

[1]: https://www.dropbox.com/l/AACMZjohFMd3UChJ9VG_GFBkun4mqXYSeqk/gs
[2]: https://www.dropbox.com/l/AAD4ii0oOwfm_fsAcDCva0hvZNFvBkydZl4/help
[3]: https://www.dropboxforum.com/t5/English/ct-p/English
[4]: https://www.dropbox.com/l/AACPi7lcd_CivRIKrbF07ECt0bbszZOfLJs
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@font-face {
font-family: "proxima_nova";
src: url("https://www.dropbox.com/static/fonts/proximanova/prox=
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<tr><td colspan=3D"3" height=3D"6"></td></tr>
<tr style=3D"line-height: 0px;"><td width=3D"100%" style=3D"font-size: 0px;=
" align=3D"center" height=3D"1"><img src=3D"https://cfl.dropboxstatic.com/s=
tatic/images/emails/logo_glyph_34_m1%402x.png" style=3D"max-height: 73px; w=
idth: 40px; *width: 40px; *height: 73px;" catalogid=3D"logo_glyph_34_2x_png=
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Grande', 'Segoe UI', Arial, Verdana, 'Lucida Sans Unicode', Tahoma, 'Sans S=
erif'; max-width: 454px;" valign=3D"top">
<h1 style=3D"font-size: 28px; max-width: 100%; font-weight: 300; margin: 0;=
line-height: 60px; text-align: center;">Take your Dropbox to the next leve=
l</h1>
<br><center><div style=3D"text-align: center;"><table cellpadding=3D"0" sty=
le=3D"width: 100%" cellspacing=3D"0"><tr style=3D"line-height: 0px;"><td wi=
dth=3D"1" style=3D"font-size: 0px;" align=3D"center" height=3D"1"><img widt=
h=3D"300px" style=3D"max-height: 550px; width: 300px; *height: 550px;" alt=
=3D"" src=3D"https://www.dropboxstatic.com/static/images/teams/onboarding/1=
3b.png"></td></tr></table></div></center>
<br><h1 style=3D"font-size: 18px; max-width: 100%; font-weight: 300; margin=
: 0; line-height: 22px; text-align: left;"><center>Good things happen when =
your stuff lives in Dropbox: your files are safe, synced, and easy to share=
. </center></h1>
<br><h1 style=3D"font-size: 16px; max-width: 100%; font-weight: 300; margin=
: 0; line-height: 20px; text-align: left;"><center>Get the most out of your=
Dropbox by completing these steps:</center></h1>
<br><table style=3D"max-width: 380px; width: 100%; font-family: 'Open Sans'=
, 'HelveticaNeue-Light', 'Helvetica Neue Light',
'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; margin=
: 0 auto;">
<tr>
<td style=3D"min-width: 50px;"><img src=3D"https://cfl.dropboxstatic.com/st=
atic/images/emails/components/checklist/check-mark%402x.png" style=3D"width=
: 16px; height: 12px;"></td>
<td>
<h3 style=3D"color: #D0D4D9; font-size: 14px; text-decoration: line-through=
; text-align: left;font-weight: 600; margin: 0 0 5px 0; line-height: 14px;"=
>Create a Dropbox account </h3>
<p style=3D"color: #D0D4D9; font-size: 14px; text-decoration: line-through;=
text-align: left;font-weight: 300px; margin: 0; line-height: 20px;"></p>
</td>
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<tr style=3D"height: 18px;"></tr>
<tr>
<td style=3D"min-width: 50px;"><img src=3D"https://cfl.dropboxstatic.com/st=
atic/images/emails/components/checklist/to-do-circle%402x.png" style=3D"wid=
th: 15px; height: 15px;"></td>
<td>
<h3 style=3D"color: #404040; font-size: 14px; text-decoration: none; text-a=
lign: left;font-weight: 600; margin: 0 0 5px 0; line-height: 14px;">Downloa=
d the desktop and mobile apps </h3>
<p style=3D"color: #404040; font-size: 14px; text-decoration: none; text-al=
ign: left;font-weight: 300px; margin: 0; line-height: 20px;"></p>
</td>
</tr>
<tr style=3D"height: 18px;"></tr>
<tr>
<td style=3D"min-width: 50px;"><img src=3D"https://cfl.dropboxstatic.com/st=
atic/images/emails/components/checklist/to-do-circle%402x.png" style=3D"wid=
th: 15px; height: 15px;"></td>
<td>
<h3 style=3D"color: #404040; font-size: 14px; text-decoration: none; text-a=
lign: left;font-weight: 600; margin: 0 0 5px 0; line-height: 14px;">Set up =
your Dropbox folders </h3>
<p style=3D"color: #404040; font-size: 14px; text-decoration: none; text-al=
ign: left;font-weight: 300px; margin: 0; line-height: 20px;"></p>
</td>
</tr>
<tr style=3D"height: 18px;"></tr>
<tr>
<td style=3D"min-width: 50px;"><img src=3D"https://cfl.dropboxstatic.com/st=
atic/images/emails/components/checklist/to-do-circle%402x.png" style=3D"wid=
th: 15px; height: 15px;"></td>
<td>
<h3 style=3D"color: #404040; font-size: 14px; text-decoration: none; text-a=
lign: left;font-weight: 600; margin: 0 0 5px 0; line-height: 14px;">Start u=
ploading your files! </h3>
<p style=3D"color: #404040; font-size: 14px; text-decoration: none; text-al=
ign: left;font-weight: 300px; margin: 0; line-height: 20px;"></p>
</td>
</tr>
<tr style=3D"height: 18px;"></tr>
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<center><a style=3D"border-radius: 6px; font-size: 15px; color: white; text=
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px; font-family: 'AtlasGrotesk', 'Open Sans', 'HelveticaNeue-Light', 'Helve=
tica Neue Light',
'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; margin=
: 6px auto; display: block; background-color: #0070E0; text-align: center;"=
href=3D"https://www.dropbox.com/l/AAC1H_YKqZoglz3E6DZWqHIr9TbNtb57ess/gs">=
Complete the next step</a></center>
<br>Questions? Check out our <a href=3D"https://www.dropbox.com/l/AACAmlSJN=
c74xfV5qP5TsCNWYMquixoNego/help">help center</a> or <a href=3D"https://www.=
dropboxforum.com/t5/English/ct-p/English">Community</a> for answers to freq=
uently asked questions.</td>
<td width=3D"36"></td>
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<tr><td colspan=3D"3" height=3D"36"></td></tr>
</table></td></tr>
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<tr><td style=3D"padding: 0; border-collapse: collapse;"><table cellpadding=
=3D"0" cellspacing=3D"0" align=3D"center" border=3D"0"><tr style=3D"color: =
#a8b9c6; font-size: 11px; font-family: proxima_nova, 'Open Sans', 'Lucida G=
rande', 'Segoe UI', Arial, Verdana, 'Lucida Sans Unicode', Tahoma, 'Sans Se=
rif'; -webkit-text-size-adjust: none;">
<td width=3D"400" align=3D"left">
<span>Dropbox, Inc.</span><br><span>PO Box 77767, San Francisco, CA 94107</=
span><br><a href=3D"https://www.dropbox.com/l/AACUsn6zT0FU35GJivY9g9qKIXiSd=
o6HOFw/privacy#privacy">View Privacy Policy</a> | <a href=3D"https://www.dr=
opbox.com/l/AACKEiND3tkuh72Js7dhuzpiMbWQ1bqXZEs">Unsubscribe</a>
</td>
<td width=3D"128" align=3D"right">&#169; 2018 Dropbox</td>
</tr></table></td></tr>
</table>
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</html><img width=3D"1" src=3D"https://www.dropbox.com/l/AAAiDSODZIUW25e9ny=
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