02-26-04 05:34 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 .da
t
>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
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