THANKS! RE: long SPF txt record
Charles.Koehler at ucsf.edu
Thu Jun 20 19:32:08 UTC 2013
My thanks to everyone who responded. --cwk :-)
From: bind-users-bounces+charles.koehler=ucsf.edu at lists.isc.org [mailto:bind-users-bounces+charles.koehler=ucsf.edu at lists.isc.org] On Behalf Of David Miller
Sent: Thursday, June 20, 2013 10:26 AM
To: bind-users at lists.isc.org
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?
>From RFC 4408 ( http://www.ietf.org/rfc/rfc4408.txt )
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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