[QCLUG] Security Certificate

[jack]

Hi all, Been a long time since my last post. Probably at least a few 
years. My question has to do with my email server (local Host). My Local 
Host (Linux Ubuntu) security certificate has expired and I get a popup 
window that Pops up everytime I check my email with Thunderbird on 
Linux, Windows, and Mac machines. How can I make the Cert. Current? What 
do I have to do to stop this. I do have access in house to the server 
and I know just enough to be dangerous.


Thanks for the help
Jack