Thanks, does that PTR record need to be setup at our DSL provider or on our
DNS?
Ed Chabot
The Marlin Firearms Company
100 Kenna Drive
North Haven, CT 06473
(203)985-3254
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Dave MacMillan
Sent: Friday, August 24, 2001 10:20 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Reverse DNS explanation
Here is how IMail answers:
220 X1 NT-ESMTP Server marlinfirearms.com (IMail 6.05 50-1)
You need a PTR record in DNS that will resolve 64.252.95.57 to
marlinfirearms.com.
Many mail servers will drop your connection if they cannot match your
IMail hostname with a PTR record for the IP address.
Please see:
http://support.ipswitch.com/kb/IM-19990108-JK03.htm
IMail - Discussion of DNS records
Also 64.252.95.57. is not an IP address because it has four "dots" not
three. MX records must point to hostnames, not to IP addresses.
Dave
In reply to 23 Aug message from [EMAIL PROTECTED]:
>Your reverse is already setup:
>MX records reported:
>marlinfirearms.com.
> 20, mail.inetu.net.
>marlinfirearms.com.
> 10, 64.252.95.57.
>PTR Records reported:
>57.95.252.64.in-addr.arpa.
> host = 57.95.252.64.snet.net.
>I believe even those mail servers that do reverse lookups
>don't try to match the names - only see if a PTR record does
>exist.
>Why not post some clipping from your log files?
>-Kevin
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of Ed
>Chabot Sent: Thursday, August 23, 2001 5:03 PM
>To: IMail_Forum@list. ipswitch. com
>Subject: [IMail Forum] Reverse DNS explanation
>Right off the bat, let me apologize if this is a "newbie"
>question. I have read the Imail guide, the help for M$ DNS
>server, and many articles,emails on the subject but it still
>eludes me.
>We have a registered domain - marlinfirearms.com and our
>website is hosted by an ISP. We have a DSL connection to the
>internet with a fixed IP address of 64.252.XX.XX. There is an
>MX record at the ISP that routes mail for marlinfirearms.com
>to the 64.252.XX.XX address which then gets routed to our
>IMail server which has an IP address of 192.168.1.2. We have
>been getting some messages in the log regarding "unable to
>relay for" and email for a couple of domains don't go
>through. Most email is going out fine! I searched the
>knowledge base (like a good boy so I wouldn't bug you with
>questions whose answers are readily available) and it seems
>that I need a PTR record in DNS so that these mail servers
>that we can't send to will find mail.marlinfirearms.com when
>they do a reverse DNS lookup on 64.252.XX.XX and that will
>match what our Imail server name is when we try to talk to
>them. Am I right, kinda right, way off track? If I'm in the
>right ballpark, do I set that up on our DNS server in house
>or do I need our DSL provider to set it up on their DNS
>server? If I'm way off base, can anyone help point me in the
>right direction? I consider myself fairly intelligent
>(doesn't everyone?) but this DNS stuff has my head spinning!
>Any help is very much appreciated and sorry for the long
>post. TIA.
>Ed Chabot
>The Marlin Firearms Company
>100 Kenna Drive
>North Haven, CT 06473
>(203)985-3254
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