Ok so here's the problem. I registered a domain for a client and then set the nameservers to my hosting. I then set the mail mx records to point to their own mail server at their office. This worked well for a while but now some mail is being bounced because there is no reverse dns set up for their mail server ip address.

Is this something that needs to be done at their end, on their exchange server or is it something that should be done at the domain control panel end ? I know at the moment I cannot do it because I asked my hosting provider. They said it had to be done at the clients end.

So thought I would check with you guys as their is a lot of experienced people out there on these forums who are sure to be able to point me in the right direction How to set up reverse dns on exchange server - help needed

Many thanks.