Re: MTA

[Vincent Lefevre <vincent@vinc17.net>]

On 2021-07-05 09:41:02 -0400, Polyna-Maude Racicot-Summerside wrote:
> Hi,
> 
> On 2021-07-05 9:35 a.m., Greg Wooledge wrote:
> > On Mon, Jul 05, 2021 at 09:23:03AM -0400, Polyna-Maude Racicot-Summerside wrote:
> >> Reporting-MTA: dns; premium58.web-hosting.com
> >>
> >> Action: failed
> >> Final-Recipient: rfc822;bjoern.ricks@greenbone.net
> >> Status: 5.0.0
> >> Remote-MTA: dns; mail.greenbone.net
> >> Diagnostic-Code: smtp; 550 X-Host-Lookup-Failed: Reverse DNS lookup
> >> failed for 162.213.253.79 (failed)
> > 
> > unicorn:~$ host 162.213.253.79
> > 79.253.213.162.in-addr.arpa domain name pointer cyrania.com.
> > unicorn:~$ host cyrania.com.
> > cyrania.com has address 172.67.185.109
> > cyrania.com has address 104.21.59.235
> > cyrania.com has IPv6 address 2606:4700:3031::6815:3beb
> > cyrania.com has IPv6 address 2606:4700:3031::ac43:b96d
> > cyrania.com mail is handled by 0 _dc-mx.f1202d9a4fb3.cyrania.com.
> > 
> > Your "reverse" (PTR record for 162.213.253.79) doesn't match.  Which is
> > to say, none of the "A" results from cyrania.com. match the original
> > IP address of 162.213.253.79.
> > 
> So is there something I can do on my side ?
> I don't have control over the IMAP/SMTP server (premium58.web-hosting.com).

premium58.web-hosting.com is not your SMTP submission server:

$ host premium58.web-hosting.com
premium58.web-hosting.com has address 198.54.120.203

What is this 162.213.253.79 IP address? Can you control its reverse?

Is cyrania.com a domain that you own?

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)