• Just for note... All port open (say the tech support of my vps)

i hope i can get mail server working.... on past... i already use it and it's works everytime.... just now i had this problem

Look like you SSL running well now. Does your web and mail service using different server?
You may WA me if need help, I'm at Jakarta, Kota Komputer 082111978168 😀

    aaP_kotakomputer.ceo i mean... so i just copy and paste the ssl from web to the mailserver?
    login roundcube is on mail subdomain
    and the ssl i just paste it from parent domain?

    because the issue is the ssl doesn't even added after loading

      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.