Email just stopped working

[daowen]

It was okay on Sunday, now it is bouncing and unable to send. Here's the test send message:

Code Select Expand

Your message did not reach some or all of the intended recipients.

      Subject: Email testing
      Sent: 2017-12-19 19:30

The following recipient(s) cannot be reached:

      '***********@gmail.com' on 2017-12-19 19:30
            Server error: '450 4.7.1 Client host rejected: cannot find your hostname, [24.239.14.203]'


Any ideas?

Note: Can still log into round cube and see the email addresses on the server.

Doug

[24x7servermanagement]

I think this issue might be due to incorrect PTR record:- https://mxtoolbox.com/SuperTool.aspx?action=ptr%3a24.239.14.203&run=networktools so fix this issue first and then try to send/receive emails.

[daowen]

Thanks for the reply, but I don't think that's the issue.

The IP address listed is my home IP, not the server, it is at 23.111.69.102.

Any ideas about that?

Regards,
Doug

[PavelZh]

PTR Record point to domain (daowen.pub), not to host