Comment 6 for bug 1821376

root@uu-sru-x:~# apt list --upgradable
Listing... Done
apport/xenial-updates,xenial-security 2.20.1-0ubuntu2.20 all [upgradable from: 2.20.1-0ubuntu2.19]
snapd/xenial-updates 2.40 amd64 [upgradable from: 2.37.4ubuntu0.1]
root@uu-sru-x:~# perl -MMIME::QuotedPrint -pe '$_=MIME::QuotedPrint::decode($_);' /var/mail/mail
From <email address hidden> Fri Nov 01 17:48:17 2019
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Subject: [package on hold] unattended-upgrades result for uu-sru-x: True
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Date: Fri, 01 Nov 2019 17:48:17 +0000

Unattended upgrade returned: True

Packages that were upgraded:

Packages with upgradable origin but kept back:
 Ubuntu xenial-updates:
  snapd apport

Unattended-upgrades log:
Initial blacklisted packages:
Initial whitelisted packages:
Starting unattended upgrades script
Allowed origins are: o=Ubuntu,a=xenial, o=Ubuntu,a=xenial-security, o=UbuntuESM,a=xenial, o=Ubuntu,a=xenial-updates
Packages that will be upgraded:

root@uu-sru-x:~# dpkg -l unattended-upgrades | cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================-==========================-============-===========================================
ii unattended-upgrades 1.1ubuntu1.18.04.7~16.04.4 all automatic installation of security upgrades