sendmail 8.12.* relay_entire_domain
I recently setup sendmail 8.12.5 and I used the FEATURE relay_entire_domain. It seems as though this was not only allowing my whole domain to relay, but it allowed the whole INTERNET to relay. I don't know if I have some weird config somewhere, but this shouldnt happen.
I removed relay_entire_domain from the .mc file, and it works fine, but I'm curious if anyone knows how this could happen?