Thunderbird Incoming Email Error

[thecavern]

Hi,

I currently use Thunderbird on a desk top with Vista.

I get a weekly newsletter and about 4 weeks ago I started getting this message when I tried to open these emails :

"Thunderbird and files.constantconnect.com cannot communicate security because they have no common encryption algorithms."

Since I did not make any changes to my settings, then obviously something changed with the sender or the sender's email server. Any idea of how to fix this ?

Thanks.