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Email problems 25TCP PORT PLESK

Posted June 9, 2020 679 views
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Hello everyone, i’m having an issue. I’m new in DO and i don’t know how much days they need to reply a ticket. I’ve installed plesk on my droplet and tried to configure domain’s email. I can receive mails but i can’t send It.

Plesk says me that I’ve the TCP 25 PORT closed but with netstat i can see that it’s open.

No DO’s firewall Is configured so there aren’t conflicts.

Dovecot Is running perfectly.

When i try this :

telnet alt2.gmail-smtp-in.l.google.com 25

The response Is :

telnet: Unable to connect to remote host: Network is unreachable

No idea of what to do and how to solve. Maybe DO blocks ports ? But why with netstat i can see them open?

Thanks to all

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KyrosWeb
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1 answer
bobbyiliev June 9, 2020

Hi there @KyrosWeb,

I believe that for new accounts outgoing TCP connections on port 25 are blocked for security reasons.

I would recommend trying with port 587 or 465 instead.

Let me know how it goes!
Regards,
Bobby

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  • KyrosWeb June 9, 2020

    Thanks for reply , i can’t find the section to enable the 465 port and online i can’t find nothing. Can you help me ?

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    • bobbyiliev June 10, 2020

      Hi there @KyrosWeb,

      I would suggest first testing if port 465 is open for outgoing TCP connections. One way to do that is to run the following command:

      • telnet portquiz.net 465

      If this does not work, I would recommend sticking with port 587, you can take a look at the official documentation here on how to enable port 587:

      https://support.plesk.com/hc/en-us/articles/213372829

      Go to Plesk > Tools & Settings > Mail Server Settings set the Enable SMTP service on port 587 on all IP addresses checkbox.

      Let me know if that works.
      Regards,
      Bobby

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      • KyrosWeb June 10, 2020

        Ho Bobby , thanks for t ply. I tried yet to enable SMTP service on 587 but it doesn’t work.

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        • bobbyiliev June 10, 2020

          Hello,

          Does the telnet command work for port 587:

          • telnet portquiz.net 587

          Also with netstat can you see port 587 as well?

          • netstat -plant | grep 587

          Regards,
          Bobby

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          • KyrosWeb June 10, 2020

            Hi Bobby a paste here what i see

            with telnet :

            Connected to portquiz.net.
            Escape character is ’^]’.
            Connection closed by foreign host.

            with netstat:

            tcp 0 0 0.0.0.0:587 0.0.0.0:* LISTEN 30647/master

            tcp 0 0 10.10.0.5:443 34.243.12.29:58756 ESTABLISHED 6529/nginx: worker

            tcp6 0 0 :::587 :::* LISTEN 30647/master

            Thanks a lot for helping

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          • bobbyiliev June 14, 2020

            Hi there @KyrosWeb,

            It actually looks all good. Are you seeing any errors in your mail log?

            Regards,
            Bobby

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          • KyrosWeb June 14, 2020
            [deleted]
            Reply Report
      • KyrosWeb June 14, 2020

        Thanks Bobby i’ve pointed DNS to another hosting where i can manage mails. On DO i haven’t received reply in support ticket so i think there is no solution.

        Regards and thanks for helping.

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