Dear Support Team, For the past two weeks, I have been experiencing significant issues with Thunderbird. The program frequently freezes, and I have also noticed that some of my sent emails are missing from the "Sent" folder. I would like to mention that other colleagues using the same email accounts do not encounter these problems, and Thunderbird has worked smoothly for me over the last 5 years. The issues started after I returned from a 2.5-week vacation during which I did not open the program. Could you please help me resolve these issues? Any advice or troubleshooting steps would be greatly appreciated. Thank you in advance for your assistance. Best regards, Rafał