If you forward an email from another email system to LionMail, the time and date stamp of the moment you forwarded the message to LionMail will appear. If the email message was moved by CUIT to LionMail on a scheduled migration date, the original time and date should appear in the email headers. You can also click and drag an email from another email system to LionMail using an imap client such as Thunderbird. If you are an Outlook user, you can add a sent date column to sort emails by their sent dates: right-click on one of the columns and select View Settings . Click on Columns . On the window that pops up, select Sent under Available columns then click Add . Click OK .