Hi, i have some viruses that are being sent from some internal infected host to my exchange server. i think its using the mx record in our internal dns to send it. Outside i have a postfix/calmAV/Spamassassin box that filters everything coming in. My question is- i want to delete the internal mx record for exchange. AFAIK, exchange will use and A record to find other exchange servers in an internal org. Will removing the mx record affect anything with my exchange org? I have a public mx record set up already for internet email. this points to postfix. thanks