All sent mails with date 01.01.0001

Hey, we have a strange error with all sent Mails, in the Mail details it always shows the sent date as 01.01.0001 01:00

MailClient_3SxoLzhL1n

But in the sent elements it shows the correct date and time.

How is this possible, is there a fix for this problem?

We need more information. What is your operating system?