I use Thunderbird as my email client and in the last few days have been getting an intermittent outbound email blockage. My ISP is Virgin Media but my email service is provided by TalkTalk (lineone.net). It seems as though the first few emails that I send after logging on are delivered successfully and then the blockage happens. First, I get a message saying that the logon to the server has failed and then I am advised of an unexpected error 80004005 but no description is available. I have attached screen shots of the error messages that I have received and would welcome guidance as to what is happening and how to resolve it. I stress that this does not happen every time I try to send an email and usually the first few send successfully.