Hi Been using thunderbird for years with no issues. I use it on a number of machines but one has for some reason stopped me being able to send emails. I get emails, can search and do all other functions but it just will not send. When I try to send it just says: Are you sure you are ready to send this message? I assume it’s something to do with settings on the machine? I haven’t changed anything myself so unsure what to do. Can you help?