My ability to send email from kay@haushousellc.com from Thunderbird stopped working on both of my computers. Msg came up saying the smtp server had timed out. Walked away for several hours and tried again with the same result. Today, I checked the settings and saw a different smtp server for the email, so I changed it. Still doesn't work inside the Thunderbird environment. A msg pops up saying the imap.haushousellc.com certificate is not valid. Someone may be trying to impersonate and don't continue. So I changed the to imap.netfirms.com. Still doesn't work. I went to Netfirms.com, launched through Roundcube and was able to sent without a problem. I am at a loss! I think this may be a result of the last Thunderbird update. Don't know how you will respond, but kay@allyourstrorage.com will work.