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In the headers of an email it says: domain of transitioning does not designate *::*:**:: as permitted sender

We need this mail to be spam-free.

I know we have to add this IP(?) to the DNS-records as a txt but what kind of IP is it, and what would the txt record look like?

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up vote 3 down vote accepted

You need to add proper SPF record in your DNS zone file for syntax of this record setup refer to:-openspf

The spf record is like:-"v=spf1 mx -all" to allow domain's MX's to send mail for the domain and prohibit all others.

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Oke, the reference is pretty clear, thanks! I guess de IP I've got is an IPv6 than? – Tim Baas Sep 12 '12 at 12:04
I dont know about your ip address whether it is ipv4 or ipv6.The syntax for both is given in my link i sent can check whether your ip is ipv4 or ipv6 – achal tomar Sep 12 '12 at 12:25
Got it, it's IPv6.. I got it to work, thanks! – Tim Baas Sep 12 '12 at 12:58
you are welcome! – achal tomar Sep 12 '12 at 14:25

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