I have 2 btconnect.com email addresses - all working fine for the last 5 years on Mozilla Thunderbird. Now we have an additioinal PC - I have downloaded Thunderbird and set up the email accounts - all emails coming in fine - BUT I cannot send emails. I have tried copying exactly all the server settings as per our existing pc which works fine - but still cannot get the emails to send. Any advice would be greatly appreciated ! Thank you