I have just found out the problem/ flaw in Mozilla Thunderbird design. When I was searching email from sender with initial letter A, I press character A and thinking Mozilla will take me to sender with alphabet starting with A like Microsoft outlook but instead Mozilla Thunderbird deleted my email. I found this very disturbing because I have been pressing character A many times. It means I have accidentally deleted many important emails. Is it possible for me to retrieve the deleted mails? Hope Mozilla will fix this problem.