|
Home > Archive > IIS Server > February 2004 > Off Topic - DNS Hosting with Reverse Lookup
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Off Topic - DNS Hosting with Reverse Lookup
|
|
| David Morgan 2004-02-26, 9:34 am |
| Hi
I don't know if anyone else is experiencing this, but we are using the SMTP
Service to send mails from our website. More and more of these mails are
being returned to us by the recipients' ISP because there is no reverse DNS
lookup configured for our web/mail server. This is an excerpt from the .dat
file that is attached to the failure notice.
Final-Recipient: rfc822;<email addr snip>
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;550 5.7.1 <email addr snip>... Fix reverse DNS for
81.23.232.10 Details http://www.hispeed.ch/wichtig
Our domain is registered with Host Europe / 123-Reg. They say that they do
not offer this service at all. I guess partly it's because of the good
features that they offer via the DNS Control Panel, but also because they
don't control the IP addresses, just the domain names.
So my question is, does anyone know of a reliable Domain Registration / DNS
Company that allows the configuration of reverse DNS for your IPs/domain
names?
Thanks, and sorry for posting here, but I know expect that you guys are an
authority on matters of this nature.
Regards
David
P.S. I know another option is to put in a smart host that is configured
properly, but we don't have one!
| |
| Jeff Cochran 2004-02-26, 12:34 pm |
| On Thu, 26 Feb 2004 14:30:43 -0000, "David Morgan"
<david@davidmorgan.me.uk> wrote:
>I don't know if anyone else is experiencing this, but we are using the SMTP
>Service to send mails from our website. More and more of these mails are
>being returned to us by the recipients' ISP because there is no reverse DNS
>lookup configured for our web/mail server. This is an excerpt from the .dat
>file that is attached to the failure notice.
>
>Final-Recipient: rfc822;<email addr snip>
>Action: failed
>Status: 5.7.1
>Diagnostic-Code: smtp;550 5.7.1 <email addr snip>... Fix reverse DNS for
>81.23.232.10 Details http://www.hispeed.ch/wichtig
>
>Our domain is registered with Host Europe / 123-Reg. They say that they do
>not offer this service at all. I guess partly it's because of the good
>features that they offer via the DNS Control Panel, but also because they
>don't control the IP addresses, just the domain names.
>
>So my question is, does anyone know of a reliable Domain Registration / DNS
>Company that allows the configuration of reverse DNS for your IPs/domain
>names?
>
>Thanks, and sorry for posting here, but I know expect that you guys are an
>authority on matters of this nature.
The DNS groups can explain it better, but there are more and more
anti-spam techniques that try a reverse lookup as a test. It's not
terribly reliable, as you've found, but servers are rejecting mail for
that reason.
The solution is usually a reverse DNS that resolves to *something*.
Most won't cross check to see if it resolves to the same name as the
message was sent from, and most ISP's can configure a reverse DNS for
the IP addresses in their delegation. You may need to find a host
that controls its own IP addresses, and there are many that do.
Jeff
|
|
|
|
|