I have a Mac Book (2006), all my emails since two and a half years have the same date. How to bring back the original dates?

Of 'date and time' I tried to drag the month and year of my menu bar. He did not stay, I did several times, but nothing helped. I closed the window and went back to my Thunderbird email to see the date, I tried to use became the date in the column "date of receipt" of all of my emails back for 2011. I changed the date a few days later, and then the date is changed on all my emails. I want to cancel everything I done the dates so that the emails show when they were initially received. I managed to get "the order received" which helps a little, but I don't see the original dates.

I checked "set date and time automatically", but it does not change the dates on my saved emails.

Of 'date and time' I tried to drag the month and year of my menu bar.

Is this something Mac?

Tags: Thunderbird

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