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Contabo SMTP block
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.
firewall on debian, allow traffic from port 25
Hhanks for your replies! The problem fixed, my friend contacted with Contabo, and they fixed the problem on their site.