Contact module sends auto-reply to sender but doesn't send me the message

This is weird, and I don't understand how it could happen. When someone uses contact form to send me an e-mail message to me, it doesn't send me (or the other recipients) the e-mail message but it sends the auto-reply e-mail to the sender.

Now;
1. How can I resolve this?
2. Do I have a chance to see any emails which are sent to me but I didn't get? (for e.g. is there any log or record of the messages which were sent by using contact module?)