DNS and Email issues

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Folk

Having trouble with Reverse DNS issue. We do not host our own DNS, and neither does our ISP. Umbrella company so to speak. Running Windows 2000 and Exchange 5.5. I need a PTR record, and of course, do not have one. Who is responsible for this? Is it the NS of the zone or my ISP or both?
 
It should actually be whoever is leasing your IP ranges for your connection.
Like Sprint, AT@T etc.....

--
Scott Harding
MCSE, MCSA, A+, Network+
Microsoft MVP - Windows NT Server

badhabit366 said:
Folks

Having trouble with Reverse DNS issue. We do not host our own DNS, and
Click to expand...
neither does our ISP. Umbrella company so to speak. Running Windows 2000
and Exchange 5.5. I need a PTR record, and of course, do not have one. Who
is responsible for this? Is it the NS of the zone or my ISP or both?
 
Yes, that is what I was afraid of. Although, will they host reverse dns if they do not host the zone?
 
In
Chad Evans said:
Yes, that is what I was afraid of. Although, will they host reverse
dns if they do not host the zone?
Click to expand...

Yes. The IP range belongs to them (they're authorative for it). Reverse has
nothing to do with the Forward zones. You can go to arin.net to view who
owns (who's authorative for) an IP address range.

http://www.arin.net/

In some cases, some ISPs will delegate the range or subnet to your DNS. You
would have to confir with them on that.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
b> Who is responsible for this?

Since you didn't provide the IP address to us, only you know.

Issue some "NS" queries for some judiciously chosen superdomains of the
reverse lookup domain name, and find out for yourself.
 
Thanks Guy

Problem is I cannot accept email at user@[IP address]. Qwest (I know, I know) owns the IP range, but ns1.flatech.com is the authoritative NS. I am ready to scream. I guess I will start with Quest's tech support and spend hours teaching them what ReverseDNS is and get no where, haha.
 
In
Chad Evans said:
Thanks Guys

Problem is I cannot accept email at user@[IP address]. Qwest (I
know, I know) owns the IP range, but ns1.flatech.com is the
authoritative NS. I am ready to scream. I guess I will start with
Quest's tech support and spend hours teaching them what ReverseDNS is
and get no where, haha.
Click to expand...
Accepting mail at user@[IPaddress] is really a matter for your mail server
RFC 822 require your mail server to accept mail in the domain literal
format.
The reverse lookup only applies to your mail server sending mail to other
mail servers, Your ISP may or may not host the reverse lookup for you, some
ISP's won't do it unless they also host the forward lookup zone, it won't
hurt to ask though.
 
In
Kevin D. Goodknecht said:
In
Chad Evans said:
Thanks Guys

Problem is I cannot accept email at user@[IP address]. Qwest (I
know, I know) owns the IP range, but ns1.flatech.com is the
authoritative NS. I am ready to scream. I guess I will start with
Quest's tech support and spend hours teaching them what ReverseDNS is
and get no where, haha.
Click to expand...
Accepting mail at user@[IPaddress] is really a matter for your mail
server RFC 822 require your mail server to accept mail in the domain
literal format.
The reverse lookup only applies to your mail server sending mail to
other mail servers, Your ISP may or may not host the reverse lookup
for you, some ISP's won't do it unless they also host the forward
lookup zone, it won't hurt to ask though.
Click to expand...

I agree Kevin. That is based on 822, and most email servers will accept mail
based on that, including Exchange.

As far as Qwest, I have Qwest for my T1 service. They delegated the whole
/24 range to me and have been authorative for it since I intiated the
service. All you have to do is call them and they will be happy to help you.
As far as a delegated subnet, not sure if they will do that, but I don't see
why not. Call them...don't try to teach them what a reverse is, they are
well aware of that, just ask what they can do for you to help you out or if
they can delegate it to your nameservers.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
The IP is 65.123.194.3

Mailserver is set to accept emails in format of domain literals. I was assuming my reason for failure is due to lack of reverse dns? I need this to get off a blacklisting I adopted from my previous "boss" As most of you what a mess and I may never get it all cleaned up.

Thanks Guys
 
In
Chad Evans said:
The IP is 65.123.194.3

Mailserver is set to accept emails in format of domain literals. I
was assuming my reason for failure is due to lack of reverse dns? I
need this to get off a blacklisting I adopted from my previous "boss"
As most of you what a mess and I may never get it all cleaned up.

Thanks Guys
Click to expand...

There is no reverse entry for this IP. Look at this nslookup output:
======================================
65.123.194.3
Click to expand...
Server: vnsc-bak.sys.gtei.net
Address: 4.2.2.2

*** vnsc-bak.sys.gtei.net can't find 65.123.194.3: Non-existent domain
======================================


And a search at www.arin.net shows this for your IP below. It looks like
Qwest delegated it to SIBT. Is SIBT your company?
=======================================
Search results for: 65.123.194.3
Qwest Communications NET-QWEST-BLKS-4 (NET-65-112-0-0-1)
65.112.0.0 - 65.127.255.255
SIBT Q0617-65-123-194-0 (NET-65-123-194-0-1)
65.123.194.0 - 65.123.194.255

# ARIN WHOIS database, last updated 2003-12-14 19:15
# Enter ? for additional hints on searching ARIN's WHOIS database.
=======================================


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
CE> Problem is I cannot accept email at user@[IP address].

Then start diagnosing that problem, instead of floundering around
adjusting randomly selected things such as DNS lookups.

<URL:http://perl.plover.com./Questions3.html>

Read the error messages that the mail system is reporting. If you
want our help diagnosing your problem from the error messages, tell
us (or, better, tell someone in the newsgroup for the relevant mail
transport or mail server software) what those error messages are
and what actions triggered them.

<URL:http://homepages.tesco.net./~J.deBoynePollard/FGA/problem-report-standard-litany.html>
 
Back
Top