set cron-apt From Address

[Mike Smith]

I setup cron-apt on my server at home and set my gmail address to get
updates whenever there are upgrades available. I setup postfix/mutt to
send through comcast's smtp server (my isp). I can send email from
mutt (it looks like it comes from my comcast account, but I can't find
a way to set the from address on cron-apt and it bounces (invalid from
domain) showing it was sent from root at MYHOST.MYDOMAIN. Can I set the
from address in cron-apt or maybe set psotfix to set ALL outgoing mail
to my comcast address?


Thanks,
Mike Smith