I posted yesterday but can't find a ticket number; I received an email this morning on my iPhone asking for clarification. I have two problems: the first I discovered during Xmas week when I used my MacBook Air exclusively when I was out of town. When I got home and tried to get my email from that week on my iMac, it was nowhere to be seen. This had never happened before. I don't know if it is still a problem because of the second problem that began yesterday (2 Jan 23) which is: I changed my iCloud password and Thunderbird no longer recognizes my account so I cannot receive or send email through T'bird on my desktop. I continue to be able to use an older version of T'bird on my notebook. Plus, I use Mail on my iPhone, which still works. So sorry about the confusion.