E-mail forward; show from which account is send

[aprodigy2u]

Perhaps i'ver overlooked it, perhaps i'm just plain stupid but here's my question:

I've made an emailforwarder to send mail to my main account,
is it possible for me to see through which account this email has been send?

I.e.
Customer mails to info@n00b.com
Mail is forwarded
I receive the email at my gmail account
Is it possible for me to see that the customer has actually mailed info@n00b.com?

Thanks in advance! :-)

[cPanelJared]

/var/log/exim_mainlog will contain this information. You can view it using the less command, or search through it using the grep command.