Originally Posted by mjd_tech
My guess is it will be immediately forwarded.
The spam gets forwarded as well and comcast will blacklist my server because it looks like my server is sending spam.
To be honest, I'm not sure right now...
You can run
tail -f /var/log/mail.log
and then send an email to an account on the server that forwards the mail to another email address. From the action in the mail log you can see if the mail is scanned for spam.