[Asterisk-Users] Fax to email using mime-contruct

[Eddie]

I have followed and succesfully receive incoming faxes to email with
Scott Laird's faxing with asterisk guide.
http://scottstuff.net/blog/articles/2004/03/28/faxing-with-asterisk

But, I'm receiving the email from root at mydomain.com.
I would prefer it to receive from asteriskfax at mydomain.com.
How do I achive this? Please advice. I'm using postfix.

Thanks.