Multiple email addresses - any alternative to ask everyone to sign all my keys?

[Christopher J. Walters]

On 7/25/2013 2:05 AM, Heinz Diehl wrote:
> The listserver should deliver the listmail with a "reply-to" header
> which points back to the list. I do that manually to avoid that simply
> hitting the reply-button sends mail directly to the sender, and not to
> the list. In procmail, something like that will do:
>
>
> :0fh
> | ${FORMAIL} -I"Reply-To: gnupg-users at gnupg.org"

I am using Thuderbird, I am not certain how to do add that header to my replies 
in this program.  It has a "Reply List" button I just forgot to use it.

Chris