For the past 1 or 2 months I am having this problem. My IP 188.8.131.52 " does not have a reverse DNS system. Please read the following problem and please correct the problem as soon as possible.
When you connect to the Internet, you are assigned an "IP Address" by your Internet provider. Your IP address for example is " 184.108.40.206 " When you reply to an ad on our system, for security reasons our servers perform what's called a "Reverse DNS Lookup" on your IP Address. The reverse DNS lookup should return a "Hostname" that corresponds with your IP Address and tells our systems what Internet provider you're connected to the Internet with.
If your ISP has not configured reverse DNS on their servers, no hostname will be returned which is what's happening with the Internet connection you are currently using and you will not be able to send a reply.
Once your ISP has reverse DNS enabled, our systems will be able to perform an instant lookup to determine that you're not using an ISP that's on our blacklist of ISP's that support scammers.