= bug description =

I attempted to add matt@domsch.com as a new address to my mailman3 account at https://lists.fedoraproject.org/admin/accounts/mailmansettings/. I received the activation email, and clicked the link. I then got an HTTP 500 error in response.

https://lists.fedoraproject.org/admin/users/address_activation/5553f4eb7deee6d3473d5d195da3a01651a1d4dd/

So then I tried with wget:

$ wget -S https://lists.fedoraproject.org/admin/users/address_activation/5553f4eb7deee6d3473d5d195da3a01651a1d4dd/
--2015-12-12 23:20:18-- https://lists.fedoraproject.org/admin/users/address_activation/5553f4eb7deee6d3473d5d195da3a01651a1d4dd/
Resolving lists.fedoraproject.org... 140.211.169.198
Connecting to lists.fedoraproject.org|140.211.169.198|:443... connected.
HTTP request sent, awaiting response...
HTTP/1.1 500 INTERNAL SERVER ERROR
Date: Sat, 12 Dec 2015 23:20:20 GMT
Server: Apache/2.4.6 (Red Hat Enterprise Linux) mod_wsgi/3.4 Python/2.7.5
Strict-Transport-Security: max-age=15768000; includeSubDomains; preload
Vary: Cookie
AppTime: D=156225
AppServer: mailman01.phx2.fedoraproject.org
Content-Type: text/html; charset=UTF-8
ProxyTime: D=246997
ProxyServer: collab03.fedoraproject.org
Connection: close
2015-12-12 23:20:20 ERROR 500: INTERNAL SERVER ERROR.