What kind of help do you need? (Example:“Panda AdminSecure”, “2093 error”) Tweet Messages sent through the PCEP platform do not reach their destination Information applies to: Products Panda Cloud Email ProtectionBelow are the instructions to identify the incident and the solution provided:SymptomsMessages sent from your domain do not reach the destination when going through the PCEP platform.SolutionYour firewall must be configured to allow the communication between your mail server and the PMEP platform.Therefore, you need to modify the firewall configuration to allow the traffic to and from subnets 126.96.36.199/27 and 188.8.131.52/24 for port 25 (SMTP). Help us improve our service by letting us know your opinion. Your suggestions will help to resolve your questions more quickly and effectively. Have you resolved your query with this article? YES NO Thanks for your answer How would you improve this article? Do you want to contact TechSupport?