THANKS! RE: long SPF txt record

Koehler, Charles Charles.Koehler at
Thu Jun 20 19:32:08 UTC 2013

My thanks to everyone who responded. --cwk :-)

-----Original Message-----
From: at [ at] On Behalf Of David Miller
Sent: Thursday, June 20, 2013 10:26 AM
To: bind-users at
Subject: Re: long SPF txt record

On 6/20/2013 1:13 PM, Koehler, Charles wrote:
> Our email group wants to change the current SPF txt record and replace it with one that is 274 characters. 
> How can I put it in so that it works correctly?
> Thanks
> --cwk

>From RFC 4408 ( )

3.1.3.  Multiple Strings in a Single DNS record

   As defined in [RFC1035] sections 3.3.14 and 3.3, a single text DNS
   record (either TXT or SPF RR types) can be composed of more than one
   string.  If a published record contains multiple strings, then the
   record MUST be treated as if those strings are concatenated together
   without adding spaces.  For example:

      IN TXT "v=spf1 .... first" "second string..."

   MUST be treated as equivalent to

      IN TXT "v=spf1 .... firstsecond string..."

   SPF or TXT records containing multiple strings are useful in
   constructing records that would exceed the 255-byte maximum length of
   a string within a single TXT or SPF RR record.

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