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Re: Long SPF records cut short?

2004-01-26 17:42:27

Plesse take a look at the SPF record for reply.ticketmaster.com (primary: a.ns.tmcs.net). It is fairly long, listing 19 hostnames, and seems to get cutoff short using the SPF testing tools I have located. I get warnings about no terminal "-all" keyword. Everything shows up using dig, but I worry that the SPF tools are not going to grok this properly. Is there a better way to publish a largish set of hostnames in a SPF TXT record?

The problem is that the TXT record is so long that it overflows the 512 byte limit of UDP, and requires TCP. Although a real DNS resolver and real DNS server will support TCP, many tools will not. And, many anti-spam programs will not either (since many require their own DNS resolver, and currently no DNS-based spam tools have a need for the >512 byte limit).

You might want to split them up using include:.
                                   -Scott

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