Reverse DNS Problems Exist error

Hi, All I need help with the configuration of a reverse DNS, I have it configured as they indicate me in the documentation of cPanel / WHM but I still can not validate the registration. I have an instance hosted on AWS and a registered domain name. Centos 7.6 and cPanel v78.0.23 Email Deliverability: the other record that I added was validated correctly (DKIM and SPF), I only have a problem with the PTR record. I did the following steps, dns functions: add a zone with the domain name and the address ip. 10x.1x0.1x2.3x.in-addr.arpa. > 3x.1x2.1x0.10x Then edit the zone, adding a ptr record with the name and value. 10x.1x0.1x2.3x.in-addr.arpa. > server.domain.net. I am new implementing cPanel / WHM, sorry if I did some stupidity. I do not know, if the problem I have with adding emails is due to this, I will leave some screenshots. When I try to add an outlook email, only incoming mail is connected but not outgoing mail. look for another alternative and try to configure it with another mail application (Thunderbird) and I could configure the mail. works correctly. but my goal is to achieve it with Outlook. I'm not an expert in the area, I'm just trying to find a solution and thanks for your contributions. My English is not very good, I hope you understand me. Best Regards. Thankz