Forwarding mails attaches an old mail to the content

We have a user who gets a lot of mails from external domains. When that user tries to forward an email to somebody else, automatically an old mail gets included in this mail. And the usual message, that is included in the email as below:

----- Forwarded by AAA/BBB/CCC on 24/08/2010 11:41 AM -----

contains an older date, instead of the current date.

I’ve refreshed the design, replaced the design. This didn’t solve the issue. Is there anything that I’m missing? Thanks in advance