Environments: Ubuntu / Sendmail / Google Apps

Emailing: I send and receive all of my emails through google apps besides emails that are sent directly from my website.

My Web Domain: example.com (for the purpose of the question only)

Problem: When my website sends an email, using sendmail, to any local address ([email protected]) I get an unknown user error. Emails sent to other domains seem to work just fine.

Question: I believe this is because I don't have these users defined on my ubuntu server, this is besides the point I need to configure sendmail such that it doesn't pick out local emails sent to ([email protected]) and instead finds their name server which points to google apps and sends it there instead.

This is my first try at serverfault, I normally use stackoverflow so let me know if I'm messing up! Thank you!