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i get smtp error 554 5.7.1 becouse the reverse dns doen not give the domain name, the mail server is hosted in a data centre, the mail domain is hosted somewhere else, how do i modify the dns ?

the domain sonor.nl is hosted bij a email service provider, the gets forwarded bij the email provider to the actual mailsever thati s hosted in a data centre, de domain name has no relationship  with exchangeserver ip adres, so you cannot reverse check de dns name, so some email is rejected bij destination servers.

is it possible to insert a dns record bij the email provider (de dns is hosted there) so that the mail what is send from the datacentre is treated as correct, so that i does nog get rejected anymore and generates  smtp error 554 5.7.1
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bastouw
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bastouw
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1 Solution
 
KaffiendCommented:
Your ISP, in this case, the data center, should provide a reverse DNS record if you ask them.
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bastouwAuthor Commented:
The ISP and the data centre are not the same parties, the isp hosts the dns,  the datacentre the exchange server.

the domain is called sonor.nl and is hosted bij partyA, The datacentre hosts the exchange server on 85.92.145.201
if you reverse dns 85.92.145.201 you get hosted by pcestreme. if you ping sonor.nl you get 213.222.25.155 if you reverse dns 213.222.25.155 you get hosted by partyA, partyA hosts sonor.nl and thus also the dns.

Is is possible to make a special record in the dns of sonor.nl so that 85.92.145.201   is treated correctly bij other mail servers  
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KaffiendCommented:
When your mail server delivers mail to another mail server, the receiving mail server will check to see if the IP address of the mail server has a reverse DNS record.
(For example, you try to send an email to someone@hotmail.com.  Hotmail's servers willl see the IP address that your mail server uses 85.92.145.201, and it will try to locate a reverse DNS record for that IP address.  If they are very strict, as more and more mail servers are these dys, they will reject any mail coming from that IP address unless it has a reverse DNS record)

So, you need to have a reverse DNS record created for your mail server's public IP address.  Since your ISP (the data center) controls the IP block that your mail server is on, it is them that you need to request to create a reverse DNS record.  Have them create a reverse DNS record for your mail server's public IP address (85.92.145.201).  The record should be mail.sonor.nl or something like that.

(PartyA does host your domain, but they cannot create the reverse DNS that you need to help mail flow)
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bastouwAuthor Commented:
I understand the solution,

I wil try to make a reverse record in the dns.
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