Amit is correct. It might effect spam scoring (I don't know that it
does), but it should not prevent acceptance by the destination server.
Here's what RFC 2821 says about this:
" An SMTP server MAY verify that the domain name parameter in the EHLO
command actually corresponds to the IP address of the client.
However, the server MUST NOT refuse to accept a message for this
reason if the verification fails: the information about verification
failure is for logging and tracing only."
--
-Eric 'shubes'
On 10/20/2010 11:13 AM, Amit Dalia wrote:
Hi Christian,
Please find mxtoolbox output below:
220 relay.that-aviation.com - Welcome SMTP Server ESMTP
Not an open relay.
0 seconds - Good on Connection time
2.153 seconds - Good on Transaction time
OK - 151.1.205.164 resolves to relay.that-aviation.com
OK - Reverse DNS matches SMTP Banner
Even if RDNS doesn't match with SMTP banner as far as I know it won't
affect your mailing.
Regards,
Amit
At Wednesday, 20-10-2010 on 23:22 Christian Ferrati wrote:
Hi,
I have a problem with my smtp server
If I test my server with mxtoolbox.com, receive this warning
message: “Reverse DNS does not match SMTP Banner”.
http://www.mxtoolbox.com/public/images/btn_green.gifNot an open relay.
http://www.mxtoolbox.com/public/images/btn_green.gif 0 seconds -
Good on Connection time
http://www.mxtoolbox.com/public/images/btn_green.gif 2.122 seconds -
Good on Transaction time
http://www.mxtoolbox.com/public/images/btn_green.gif OK -
151.1.205.164 resolves to relay.that-aviation.com
http://www.mxtoolbox.com/public/images/btn_yellow.gif Warning -
Reverse DNS does not match SMTP Banner
My server hostname is: relay.that-aviation.com and with dig tools,
all answer section are correct:
164.205.1.151.in-addr.arpa. 14400 IN PTR relay.that-aviation.com.
that-aviation.com. 86400 IN MX 10 relay.that-aviation.com.
Ho I can fix the problem?
With this problem I have problems to send e-mails with some provider
or client?
Thank you very much
Christian Ferrati
Dipartimento Tecnico/Sistemi
Smartcom SpA
Via R. Lepetit, 8 – 20020 Lainate (MI)
Tel. 0299813311 Fax 0299813197
www.smart-com.it <http://www.smart-com.it>
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