MX and PTR question

One of our users is getting bounce back emails from one email address.

"Diagnostic information for administrators:
Generating server: MI01EXCH001.miomni.com
Lalithasorubiny.Pratheeparaj@mhllp.co.uk
barracuda.mhllp.co.uk #554 IP name lookup failed. No PTR record found. ##"

After using DNSStuff toolbox, it says I have a problem with reverse DNS from the MX records.
(
http://www.dnsstuff.com/tools#dnsReport|type=domain&&value=smartchannelnetwork.com
)

As we manage the DNS internally, could someone tell me what I need to update in DNS?
Thank you.
jamiegfAsked:
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Joseph MoodyBlogger and wearer of all hats.Commented:
You need to create a PTR public DNS record that says MAILSERVER.FQDN is PUBLIC IP.

Example:

Hostname: mail.testdomain.com
IP: 124.11.13.14
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MAS (MVE)EE Solution GuideCommented:
You should contact your local ISP and let your ISP create reverse DNS(PTR) record for you
e.g.
This is A you created in your external DNS
mail.domain.com --> 91.14.230.185
You should contact your ISP to create PTR (reverese DNS) to resolve  91.14.230.185 to mail.domain.com
i.e.  91.14.230.185-->mail.domain.com
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Satya PathakLead Technical ConsultantCommented:
why we require a PTR please go trough the below KB

http://help.dnsmadeeasy.com/spry_menu/ptr-record/
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Satya PathakLead Technical ConsultantCommented:
Also would suggest you to please do not share internal information like "Public IP  & Mailserver deatils and"of public forum ..

http://www.dnsstuff.com/tools#dnsReport|type=domain&&value=smartchannelnetwork.com


Thanks
Satya
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VB ITSSpecialist ConsultantCommented:
Reverse DNS records are managed by your ISP so you'll need to contact them to update it. As they are the ones that own your public IP address, only they will be able to make the necessary changes.

See here for a very good explanation on how reverse DNS works and why your ISP needs to make the change: http://www.dnsstuff.com/reverse-dns-faq/
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jamiegfAuthor Commented:
we seem to manage our own public dns entries. The ISP points back to our DNS servers. So i need to be able to do this on our DNS. I have tried creating a reverse lookup zone and adding the PTR in there but it has not resolved the issue.
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VB ITSSpecialist ConsultantCommented:
I don't think you understand. Reverse DNS starts off with your ISP as they are the ones that actually own your IP address and so DNS requests for your IP address begins with them. There are lots of articles out there that explains how Reverse DNS works but you need to understand that it all begins with your ISP.

Give your ISP a call, say you need to set up a PTR record to match your MX record in DNS and they should be able to help.

Please have a read of this article as well which does explain rDNS a bit better than the previous one I linked: http://support.simpledns.com/kb/a45/what-is-reverse-dns-and-do-i-need-it.aspx
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MAS (MVE)EE Solution GuideCommented:
@jamiegf
Please understand what is PTR as commented by VBITS.
This is controlled by your ISP  which holds your public IP.
Only they can do it for you.
I have clearly mentioned the same in my first post.
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jamiegfAuthor Commented:
Youre right. I didnt understand. The isp has added the PTR and we can now successfully message the recipients.
Thank you.
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