Hi guys, We had setup long time ago a Reverse DNS lookup setting on exchange 2000 server. We were facing problems from many vendors/bussiness associates to get the emails because they haven't any ptr record for their email server ip address. We needed to take out this property. I went to the Exchange enterprise manager and on the virtul smpt server setting unchecked the box for do reverse lookup on incoming messages then restarted the server. Now its two days but still have problems to get the email from those email servers who haven't any PTR record. One of the company set up the ptr record and we are getting their emails. How i can check that my server is still doing the reverse lookup and where i can find that property to make it disable. I will really appreciate any bit help. Basit