On 22/7/22 I used my laptop in hospital using their WiFi I only mention this as it was on this date when I opened Thunderbird that I realised I had lost all my emails from the inbox except for the most recent, so there were only four messages currently showing. I checked all folders Junk/Trash etc but there was nothing to be found. There is one email from January 2020 that remains in the inbox but it was not highlighted or starred so I have no idea why that one should remain when hundreds of others have been deleted. Is there any way to find these messages as some of them are really important and relate to financial matters. I really hope someone can help me. It was suggested that Avast anti virus may be responsible but I have contacted Avast and they say it has nothing to do with Avast. Regards Alex