Re: Multiple TXT records

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On Tuesday 30 December 2003 16:06, R. Scott Perry wrote:

   If multiple explanation TXT records are returned, they are
   concatenated in the order they were received.  Use of multiple TXT
   records is discouraged as DNS does not guarantee order.

I think if multiple TXT records are returned, all but the first should be
ignored.


The problem is that SPF is co-existing with other DNS records.  If you
already have a TXT record for your domain for some reason (quite a few
domains do), then multiple TXT records are necessary.


So how about we ignore all but the first TXT record which starts with the 
magic "v=spf1 ... " ?  I just wanted to take out the need to concatenate 
arbitrary numbers of TXT records.  If a domain wants to have really 
complicated rules, it should indicate them by asking clients to do an A 
lookup for the in-arpa IP representation using macros, and implement the 
complicated logic or detailed database using resources on its own hardware.  
Otherwise a domain owner can specify about 18 IPv4 ranges or 8-9 IPv6 ranges 
and still fit within a 512 byte packet.  

- -- 
Matthew Bloch                             Bytemark Hosting
                                  tel. +44 (0) 8707 455026
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