allows to rewrite outgoing address.

In my development env i want to make sure nobody can send a mail to a wrong address. So all outgoing mails are changed.

Signed-off-by: Bram Gillemon <bram@gillemon.be>

.travis.yml

@@ -23,6 +23,12 @@ env:
   - INSTANCE=default-centos-7
   - INSTANCE=default-ubuntu-1404
   - INSTANCE=default-ubuntu-1604
+  - INSTANCE=canonical-centos-6
+  - INSTANCE=canonical-centos-7
+  - INSTANCE=canonical-debian-7
+  - INSTANCE=canonical-debian-8
+  - INSTANCE=canonical-ubuntu-1404
+  - INSTANCE=canonical-ubuntu-1604
 
 before_script:
   - sudo iptables -L DOCKER || ( echo "DOCKER iptables chain missing" ; sudo iptables -N DOCKER )