Hi Everyone. Suddenly this morning I was unable to send or receive any E-mails using my Thunderbird account. Everything had previously been working fine. I telephoned my Internet Service provider ( Talk Talk ) and learned that their engineers were aware of an outage covering my area, and were working to fix it. Now this afternoon I logged-on again and discovered that I was able to receive E-mails but not send any replies. In other words, I can't answer any E-mails. So I spent an hour on the telephone to Talk Talk customer service. They checked all my existing mail connections ( Tiscali Pop 3 account ) which were all correct as specified. Outgoing server connection is smtp.tiscali.co.uk with port 587. It was working OK until this morning. Apparently Talk Talk are trying to persuade everyone to stop using third-party apps ( like Thunderbird ) and instead to use Talk Talk Webmail ! But I don't want that ! I like the layout on Thunderbird and am used to finding my way around my E-mails. I really don't like the format and style of Webmail. We left it that they would " escalate " the matter and get a senior manager to telephone me within the next day or two. That means, I am still unable to send any E-mails. When I attempt to send any E-mails I just get a message which says " connected to smtp.tiscali.co.uk " and the green " progress line " is completely green which presumably means my E-mail is in the process of being sent. But after that, although the green line is complete, nothing else happens and the E-mail does not get sent. Right now I am hoping that Talk Talk will have a " fix " for this issue when they ring me back. But I don't want to change my E-mail address and I certainly don't want to use Webmail. Any advice would be much appreciated. Many thanks. SG.