When I search for an email using the search facility I am usually able to click on the blue title in the list of possible emails and it is displayed for me to read. I have found the (fairly recent) emails I'm looking for in the search results but I am not able to open them???? Others on the list work as expected. Can anyone please explain why this has happened and more importantly how I can retrieve then from wherever they may be? I must say I've found Thunderbird increasingly 'flakey' recently which is very worrying. Thank you for any help you are able to offer.