Comment 11 for bug 1646538

It works.

====

$ apt-cache policy pdns-recursor
pdns-recursor:
  Installed: 4.0.0~alpha2-2
  Candidate: 4.0.0~alpha2-2ubuntu0.1
  Version table:
     4.0.0~alpha2-2ubuntu0.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-proposed/universe amd64 Packages
     4.0.0~alpha2-2osso1 500
        500 http://ppa.osso.nl/ubuntu xenial/osso amd64 Packages
 *** 4.0.0~alpha2-2 500
        500 http://apt.osso.nl/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

$ dig A umcg-nl.mail.protection.outlook.com. @127.0.0.1 +edns +dnssec
...
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 19210

====

$ sudo apt-get install pdns-recursor

$ apt-cache policy pdns-recursor
pdns-recursor:
  Installed: 4.0.0~alpha2-2ubuntu0.1
  Candidate: 4.0.0~alpha2-2ubuntu0.1
  Version table:
 *** 4.0.0~alpha2-2ubuntu0.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-proposed/universe amd64 Packages
        100 /var/lib/dpkg/status
     4.0.0~alpha2-2osso1 500
        500 http://ppa.osso.nl/ubuntu xenial/osso amd64 Packages
     4.0.0~alpha2-2 500
        500 http://apt.osso.nl/ubuntu xenial/universe amd64 Packages

$ dig A umcg-nl.mail.protection.outlook.com. @127.0.0.1 +edns +dnssec
...
;; ANSWER SECTION:
umcg-nl.mail.protection.outlook.com. 10 IN A 213.199.154.23
umcg-nl.mail.protection.outlook.com. 10 IN A 213.199.154.87