Hello,When some clients try to sent an email the often get the following message: <sv01.test.local #5.7.1 smtp;554 5.7.1 This message has been blocked because the return email domain is invalid.(failed to obtain DNS record for domain test.be)>I already changed de FQDNS in my exchange server but this doesn't solve my problem. The strange thing is, when I try to send the email a few seconds later , it's sended.The IP in my public mx record, is the same as the IP of my WAN connection

It looks like you don't have all the required DNS entries for your e-mail domain and/or server.-- Ed Crowley MVP"There are seldom good technological solutions to behavioral problems.". "Claas Jaguar" wrote in message news:90ba7a21-47e3-4271-962c-338907468f16...Hello,When some clients try to sent an email the often get the following message: <sv01.test.local #5.7.1 smtp;554 5.7.1 This message has been blocked because the return email domain is invalid.(failed to obtain DNS record for domain test.be)>I already changed de FQDNS in my exchange server but this doesn't solve my problem. The strange thing is, when I try to send the email a few seconds later , it's sended.The IP in my public mx record, is the same as the IP of my WAN connection Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Can you tell me more about it. What should I configure in My DNSIf have only entries for the domain test.local in my DNS configuration.

test.local is not a routable domain over the Internet.-- Ed Crowley MVP"There are seldom good technological solutions to behavioral problems.". "Claas Jaguar" wrote in message news:5583020c-335c-4087-bffa-e32ce9a63c20...Can you tell me more about it. What should I configure in My DNSIf have only entries for the domain test.local in my DNS configuration. Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, Please use the below link to test your outbound SMTP email? https://www.testexchangeconnectivity.com/ If the transport has errors, it will tell you how to fix it. Please post the errors on the forum. I’m looking forward to your reply. Thanks, Richard.

Performing Sender ID validation Sender ID validation performed successfully Test Steps Attempting to find SPF record using DNS TEXT record query Failed to find SPF record Additional Details No Records were found

Hello, Is it also possible that it has something to do with licensing. It is a SBS for 5 users, but 6 users are connected. But we have planned to do Licences CAL upgrade. But can this be the reason for my problem ?