Since a recent update, I am finding Thunderbird almost unusable. Problem: It is linking emails together that I want to be separate. It shows a little arrow next to the Subject. Is this called Threading? I just discovered replies to emails this morning in these threads that have not shown up to me as a new email coming in. I've just taken people to task for not responding, when they actually did... days ago. I can't find any way of stopping the emails linking together. I need all these linked emails to be separated. I just sent a test email to myself. Then sent a separate test email to myself with the same subject title and they are now linked together. I can't use a system like this. I've unticked the 'Thread' command in the drop down menu, but that doesn't help. Is it possible to unlink them all? Thank you. David Ashworth. NOTE: I do send you a monthly donation.