[Users] reply to list doesn't work for me

[sylpheed at 911networks.com]

CM 3.13.1 on arch.

When I click on "List", instead of replying to the list I get:

to: sylpheed at 911networks.com
instead of: users at lists.claws-mail.org

for email: 

> Message-ID: <20160113175757.3e5779bc at kaxu>
> Subject: Re: [Users] vCalendar can 'merge' some calendars?

This is not just for that, but for all the lists that I subscribe to.

Is something wrong with my setup (and where to look) or is this a CM
bug?

-- 
sknahT

vyS