Sendmail and valid e-mail addresses use /etc/mail/access?

[cslyon]

I have been doing some research on how to get sendmail to only accept e-mails from valid systems. I am using Sendmail w/ Spamassassin to filter out the spam going into our exchange servers and have wrote a script to pull all the e-mail address from the AD tree using LDAP. So I have all the vailid ones but can't figure out the right way to implement it.

Based on my research I image I need to populate the /etc/mail/access file with all the e-mail addresses