I've restarted my servers a few times and everything was fine, but yesterday I restarted them again, and since 1pm yesterday, nobody has been able to receive emails from addresses that are outside of the company domain. E.g. "@hotmail.com" "@gmail.com" etc.. We can send to outside emails perfectly fine and internal sending and receiving works fine, but we cannot receive from external emails. I've already tried telnetting and I've gotten all the right responses and IP addresses. I have no clue what to do and this is affecting 350+ company clients which is causing major problems. Please help!!!
One server is the Domain Controller with Active Directory and the other is running exchange, files, and apps. We only have 2 servers here.