Issue DNS Settings - Possibly forged hostname

[Malte]

Hi,

I am getting a (small) amount of rejected emails with this error after a Plesk Migration to 12.5. We never had any issues before the migration so I am bit lost:

Message is waiting at host2.anwaltonline.com for delivery to mx01.xworks.net.

Message delivery has been delayed to the following recipients:
Recipient: [SMTP:[email protected]]
Reason: Remote SMTP Server Returned: 451 4.1.8 Possibly forged hostname for 67.43.1.130

My host informed me that all DNS settings are in order. A check on shows this for the server in question:

http://dnstools.fastnext.com/index.php?fDNSreport=anwaltonline.com

MX: FAILED. The IPs of not all of your mail server(s) have correct reverse DNS (PTR) entries. The reverse DNS entries are:

142.140.59.209.in-addr.arpa. host2.anwaltonline.com. [TTL=3600]

Since I have no idea about DNS: Can anyone confirm that this issue is not with the DNS setup but with the receiver's mail setup? If its my side: What changes are required?

 

[UFHH01]

Hi Malte,

nope, it's a misconfiguration at YOUR side:

https://www.dnswatch.info/dns/dnslookup?la=en&host=67.43.1.130&submit=Resolve

130.1.43.67.in-addr.arpa.    PTR    3600    host2.anwaltonline.com.

https://www.dnswatch.info/dns/dnslookup?la=en&host=209.59.140.142&submit=Resolve

142.140.59.209.in-addr.arpa.    PTR    3600    host2.anwaltonline.com.

https://www.dnswatch.info/dns/dnslookup?la=en&host=host2.anwaltonline.com&type=A&submit=Resolve

host2.anwaltonline.com.    A    86400    209.59.140.142

Check with "mxtoolbox.com" ( http://mxtoolbox.com/domain/anwaltonline.com/ ):

Transcript: Connecting to 209.59.140.142

Transcript: 220 host2.anwaltonline.com ESMTP MailEnable Service, Version: 9.00-- ready at 10/09/16 09:25:07 [627 ms]

Transcript: EHLO PWS3.mxtoolbox.com

Transcript: 250-host2.anwaltonline.com [64.20.227.134], this server offers 4 extensions

 

[Malte]

thanks will forward the info to my ISP