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). Would it be better to simply not use Cloudflare (free tier) for the domain where I am using mail service ? Because my web server is mostly on polynamaude.ca / polynamaude.org . It's mostly a parking page for polynamaude.com that I could simply remove. > Some SMTP receivers may care about that. Apparently the receiver for > greenbone.net (whose name is mail.greenbone.net) is one of them. > -- Polyna-Maude R.-Summerside -Be smart, Be wise, Support opensource development
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