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Contabo SMTP block
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Contabo SMTP block

adnsadns Member

Hi all!

My friend has a VPS S SSD at Contabo. He runs Mailu in Docker. He experienced that can't send email out.

I checked his VM, and I realised that the SMTP dst port to external host (25) is blocked on IPv4. I tried on the installed system (Debian 10), and on the live rescue system (Debian 10 live).

As a first try, I restarted the mailu so the logs are lost, I can't check that if is it hacked.

Has anyone experienced that port 25 locked at Contabo? I suggested to my friend that contact with the support team.

P.S: I have a Contabo server too. I don't have problems. I can send out mail and the performance is very good in Dusseldorf DC.

Comments

  • My Contabo VPS at SG email works with no problem.

  • Running a mail server on mine too. No problems sending email.

  • skorupionskorupion Member, Host Rep

    firewall on debian, allow traffic from port 25

  • adnsadns Member

    Hhanks for your replies! The problem fixed, my friend contacted with Contabo, and they fixed the problem on their site.

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