The newest update to Thunderbird Email Client is bugged and broken, I can recieve email but cant send email from the client. This seems to be a major bug that they say there is a work around for.
The work around has not worked for me and now they say this small update fixs it, it did not fix my problem. So for the first time in many years im using another email client and it I like it far better. Its much lighter and faster and easier to use really.
Its called EMclient, its free for one or two email accts and has more features in the paid business acct, none of which I need.