Reverse dns record in my dns configuration

I need to add a reverse dns record in my dns configuration.

I am getting this error  74.86.153.160 is the ip of the mail server

Remote host said: 451 4.1.8 Possibly forged hostname for 74.86.153.160

I have access to the dns zone  of the domain

Any ideas
robrodpProgrammerAsked:
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Tom CieslikIT EngineerCommented:
If you talking about external DNS in your registrar record, then they are creating reverse zone automatically.
I think something is missing in your DNS setting

Make sure you have A record for you email server name with IP 74.86.153.160
like:
autodiscover .yourdomain.com      7200      74.86.153.160
email .yourdomain.com      3600      74.86.153.160

Make sure you have MX record configured
Make sure you have TXT record for your email server

v=spf1 ip4:74.86.153.160 a:email.yourdomain.com mx:yourdomain.com ptr ~all
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robrodpProgrammerAuthor Commented:
Thx for the insight all is working ok now
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MaheshArchitectCommented:
PTR record cannot be created by your domain dns panel
it has to created by ISP who owns the public ip address used by you to send emails out
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nociSoftware EngineerCommented:
This is stil no reverse lookup...  for that you need a PTR record.
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robrodpProgrammerAuthor Commented:
What tool can I use to check this issue?
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nociSoftware EngineerCommented:
dig    -x 74.86.153.160

(dig is a DNS query tool)

https://mxtoolbox.com/
has various checks...,  look for a  & ptr.  like in:
https://mxtoolbox.com/SuperTool.aspx?action=ptr:74.86.153.160

(which tells biomedical-service.com  which means you mail server needs to present that name as HELO (EHLO) announcement.
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robrodpProgrammerAuthor Commented:
How can I check if my mail server presents biomedical-service.com as HELO (EHLO) announcement?

Or is the mxtoolbox returning that ptr means it is ok?
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nociSoftware EngineerCommented:
No MXtoolbox only checks DNS entries. That should be in the configuration...
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