The "Date" field of a message is set by the sender. If their clock has lost a few hours or is a century ahead or possibly if their time zone information is not set correctly, the date in the message can differ from the date when the message was really sent. Incidentally, the "Date" field is what Mozilla Thunderbird uses when you sort mail by the Date column.
Fortunately, Mozilla Thunderbird also keeps track of when a message was received (independent from when it was sent or claims to have been sent). Often, you can use this information to give your Inbox a more useful order.
Sort Mail by the Order It Was Received in Mozilla Thunderbird
To sort mail by the order it was received in Mozilla Thunderbird:
- Open the desired folder in Mozilla Thunderbird.
- Select View | Sort by | Order Received from the menu.
- Using View | Sort by | Ascending and View | Sort by | Descending you can reverse the order.
It's a pity, but Mozilla Thunderbird cannot group messages by the order received yet.