So... we patched the sendmail source to add some additional funtionality and now we're looking at our new RPMs and wondering what we need to do now. The answer... simple... let's install them.
For those of you who may have already installed sendmail, when you did your initial Red Hat Linux installation, you now get to do an upgrade installation. To be safe you might want to backup your existing configuration. If you have a default install you will need the following:
/etc/sendmail.cf /etc/aliases /etc/mail/*
So gather up everything and put it some place safe. Then you should install your updated RPMs. The quickest way to do this is to do the following:
cd /usr/src/redhat/RPMS/ixxx (where xxx = the architecture you chose with your build command. In our case it was 686)
rpm -Uvh sendmail* --force
Note: --force isn't always needed but if you have the sendmail RPMs already installed you will need to use it as the version numbers of our new sendmail RPMs were not iterated. The install won't work without it.