SpamCop has been seen to be sending out spam.  The related tracking URL is https://www.spamcop.net/sc?id=z6123673049zf1dfd1fd836e63c4191bacfbe0460a80z.  I would hope that this is a one off occurance.

SpamCop v 4.8.2.018 © 2015 Cisco Systems, Inc. All rights reserved.
Here is your TRACKING URL - it may be saved for future reference:
https://www.spamcop.net/sc?id=z6123673049zf1dfd1fd836e63c4191bacfbe0460a80z
Skip to Reports
x-store-info: 4r51+eLowCe79NzwdU2kR3P+ctWZsO+J
Authentication-Results: hotmail.com; spf=none (sender IP is 145.132.35.138) smtp.mailfrom=zuxncfurrzu@online420delivery.com; dkim=none header.d=online420delivery.com; x-hmca=none header.id=zuxncfurrzu@online420delivery.com
X-SID-PRA: zuxncfurrzu@online420delivery.com
X-AUTH-Result: NONE
X-SID-Result: NONE
X-Message-Status: n:n
X-Message-Delivery: Vj0xLjE7dXM9MDtsPTA7YT0wO0Q9MjtHRD0yO1NDTD02
X-Message-Info: JfHF6Sa9NeueFpySTo4Y0FSoL+sFVEh4A451jJ29lsfmWmKoyPAy+wOEFsTrXxy44pQuvhlXFGhT7k5TsPntfhL6IpYr+2sKGldfWJ0908yQl/SYKwApdWAz8hl7yU1PxbjqHNtsurl7vIRdoiJ/fr1Ya8/6BAGIybSYZtFsXRNTExq5DysmuFkb6Oxhiclsvj5mqT2xCx/eFq+gex189mvROBVlOfKF
Received: from online420delivery.com ([145.132.35.138]) by BAY004-MC4F60.hotmail.com with Microsoft SMTPSVC(7.5.7601.23008);
	 Thu, 21 May 2015 19:00:18 -0700
X-TMN: [sBXQ0GD5xNiG34Ro3sYXoYjBlWq/]
Message-ID: <k2gY________________________84DJ@mail.gmail.com>
Content-Type: multipart/alternative; boundary="158046576145231459"
From: "Online420-Delivery" <zuxncfurrzu@online420delivery.com>
To: <x>
Subject:
Date: Thu, 21 May 2015 05:08:42 -0800
Importance: Normal
MIME-Version: 1.0
Return-Path: zuxncfurrzu@online420delivery.com
X-OriginalArrivalTime: 22 May 2015 02:00:19.0313 (UTC) FILETIME=[0E03FE10:01D09433]
View entire message
Parsing header:
0: Received: from online420delivery.com ([145.132.35.138]) by BAY004-MC4F60.hotmail.com with Microsoft SMTPSVC(7.5.7601.23008); Thu, 21 May 2015 19:00:18 -0700
No unique hostname found for source: 145.132.35.138
Hotmail/MSN received mail from sending system 145.132.35.138

Tracking message source: 145.132.35.138:
Routing details for 145.132.35.138
Report routing for 145.132.35.138: bad_tracking@admin.spamcop.net
bad_tracking@admin.spamcop.net redirects to forged-ip@don.spamcop.net
Message is 39 hours old
145.132.35.138 listed in cbl.abuseat.org ( 1 )
145.132.35.138 is an open proxy
145.132.35.138 not listed in accredit.habeas.com
145.132.35.138 not listed in plus.bondedsender.org
145.132.35.138 not listed in iadb.isipp.com
Finding links in message body
Recurse multipart:
   Parsing HTML part
Resolving link obfuscation
   http://www.online420delivery.com
Tracking link: http://www.online420delivery.com/
[report history]
ISP does not wish to receive report regarding http://www.online420delivery.com/
Host www.online420delivery.com (checking ip) IP not found ; www.online420delivery.com discarded as fake.
www.online420delivery.com is not a routeable IP address
Cannot resolve http://www.online420delivery.com/
Reports regarding this spam have already been sent:
Re: 145.132.35.138 (Administrator of network where email originates)
   Reportid: 6310707457 To: forged-ip@don.spamcop.net
Re: http://www.online420delivery.com/ (Administrator of network hosting website referenced in spam)
   Reportid: 6310707458 To: abuse@namecheaphosting.com
If reported today, reports would be sent to:

Re: 145.132.35.138 (Administrator of network where email originates)

forged-ip@don.spamcop.net