sendmail: how to configure sendmail on ubuntu?

When I searched for configuring sendmail on ubuntu I din't get any clear answer, each of them assume I know what they are talking about, I just want basic configuration to enable email sending, basically I will use it with google app engine to enable mail sending from dev server. I already did this: sudo apt-get install sendmail then sudo sendmailconfig but I don't know what the last one actually did.