<Maycon@discussions.microsoft.com> wrote:

>Hi Jeff
>I have included the IP of the customer in my DSN as Host Foward Lookup Zones.
>I have a subnet with other IP range so I cant include into DSN in the
>Reverse Lookup Zone
>
>Could you please tell what should I do in this case?

>"Jeff Henkels" wrote:
>
>> "Maycon" <Maycon@discussions.microsoft.com> wrote in message
>> news:D732651B-7602-40C9-9118-A7618E7C3173@microsoft.com...
>> > Hi there
>> > I have received this message when I send email for one email address. What
>> > I
>> > have to configurate to enable. Will be in my Server or the another side?
>> >
>> > Your message Subject: "Xxxxxxxxx XXXxxxxxx"
>> > could not be delivered to some or all of the intended recipients.
>> >
>> > User<xxxx@xxxxxxx.co.nz> - (554 This server requires PTR for
>> > unauthenticated
>> > connections.)
>>
>> PTR is a type of DNS record that allows for reverse DNS lookup (i.e. given
>> an IP address, get a DNS name) -- it's a common anti-spam measure. See
>> http://www.dnsstuff.com/info/revdns.htm for a description of how reverse DNS
>> works.
>>
>> Basically, you'll have to ask your ISP to provide reverse DNS.
>>
>>
>>