Warning - Reverse DNS does not match SMTP Banner

[Richieboydev]

Hello,

OS = CentOS 6.5 (Final)
Plesk version = 12.0.18 Update #7, last updated at July 11, 2014 12:46 PM


I have been trying to make my sites better suited to anti spam measures. The only warning I have left to work out is:

Warning - Reverse DNS does not match SMTP Banner

In the Plesk settings i do have the outgoing mail setting set to Send from domain IP addresses and use domain names in SMTP greeting - still I get the warning.

I am using Post fix. This is a 1and1 dedicated server and I am using custom name servers for this domain. I believe the smtp banner is matching the main ip and not the domain.

Can anyone help me fix this issue?


Thanks,
Rich

 

[Lloyd_mcse]

Have you set the rDNS for the IP/s outside of Plesk?
You may need to ask 1&1 to do it, or it may be in the 1&1 panel.

Hope it helps

Kind regards

Lloyd

 

[Richieboydev]

Thanks for your help. I am always pulling my hair out when working with dns.

Yes, reverse ip is set up if that is what you mean.

I believe the dns is set up correctly but also this domain is not resolving.. when I check dns though in mxtools I am getting the reverse banner message and it is saying the name servers are not resolving in a timely manner. I am using other same name servers on another domain fine.



Thanks again for your help. I cannot tell you how much I appreciate it. 1and1 does not want to help if I am not using their name servers.

..

 

[Richieboydev]

I think maybe this is not fully propagated yet..

 

[Lloyd_mcse]

According to mxtoolbox your mail server name is...

220 u17634561.onlinehome-server.com ESMTP Postfix

rather than mail.wingsgroup.org but then looking at mxtoolbox subnet tool, the PTR on the IP is just wingsgroup.org, see..

http://mxtoolbox.com/subnet/?filter=74.208.224.252/29&source=quicklink.

You ideally want..

mail Server name: mail.wingsgroup.org
PTR: mail.wingsgroup.org

Hope it helps
Kind regards

Lloyd

 

[Richieboydev]

I think this is because the onlinehome-server.com is the hostname for the server. There are multiple sites.

PTR for this domain is


I should just add "mail"??

Thanks

 

[Richieboydev]

Can I just add another PTR record to each domain?

If I have a single mail server sending out all email for all domains how is it possible to have this match each domain?

Thanks

 

[Richieboydev]

This is another site on the server I am having issues with trying to get from going directly into Gmails spam folder. The only warning in Mxtools now is the reverse smtp banner.

I have set up new name servers, spf record, etc. The domain has a dedicated ip with 2 name servers that have their own ip addresses. Those are ns1 and ns2.talkdevelopment.org..when I test talkdevelopment.org in the mxtool test it passes.

From the info below I can see it is using u17634561.onlinehome-server.com instead of the site domain..

I would be happy to give a small donation to anyone that can help me fix this.


Connecting to 74.208.224.253

220 u17634561.onlinehome-server.com ESMTP Postfix [2231 ms]
EHLO MXTB-PWS3.mxtoolbox.com
250-u17634561.onlinehome-server.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-STARTTLS
250-AUTH PLAIN DIGEST-MD5 CRAM-MD5 LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN [686 ms]
MAIL FROM: <[email protected]>
250 2.1.0 Ok [686 ms]
RCPT TO: <[email protected]>
554 5.7.1 <[email protected]>: Relay access denied [686 ms]

MXTB-PWS3v2 5694ms