Now i get
" The IP address sending this message does not have a 550-5.7.25 PTR record setup" error

the way i can fix the error on original post is port "25" filtered (the vps company) said it's open... but it's filtered when i tested with nmap it's said "filtered" so the vps company fix it and now it's solved....

but now... the new problem is, any email that i sent... never arrive... for gmail user
it says

bounced (host gmail-smtp-in.l.google.com[142.251.12.27] said: 550-5.7.25 [103.187.146.233] The IP address sending this message does not have a 550-5.7.25 PTR record setup, or the corresponding forward DNS entry does not 550-5.7.25 point to the sending IP. As a policy, Gmail does not accept messages 550-5.7.25 from IPs with missing PTR records. Please visit 550-5.7.25 https://support.google.com/mail/answer/81126#ip-practices for more 550 5.7.25 information. p18-20020a63f452000000b0042b29871d8asi9632636pgk.247 - gsmtp (in reply to end of DATA command))

any solution for this?

    Dhanamerdeka
    Hello, find a server provider or network provider to make a PTR record for your ip.
    What is your system like? debian11 has not yet adapted to the mail server

        Solution for all this is....

        • Check port 25 (on my case, the port is opened but by vps operator it's open as "filtered") so we need to fully open it....
        • add PTR records....
          it will goes like this.. PTR
          Name domain.com (with A to the ip example 1.2.3.4)
          Content 4.3.2.1.in-addr.arpa
          TTL Auto

        i hope someone that had similar problem should fixed with my solution

        2 years later

        I`m using Contabo hosting.
        The support team asked me to add the PTR record from my control panel.
        I have two fields In the Reverse DNS management
        IP ADDRESS ( my server IP address )
        PTR RECORD: mydomain.com ( my real domain )

        But, sometimes I get PTR error from Gmail.

        I must say, my DNS management is with Cloudflare.
        Do I need to add PTR to my Cloudflare DNS records?

          It is recommended to consult the VPS provider and check whether the configuration is effective and correct.

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