SPF records for subdomain

[Stephane Bortzmeyer]

On Sat, Jul 24, 2004 at 06:36:32AM -0700,
 Jason Mader <jason at ncac.gwu.edu> wrote 
 a message of 32 lines which said:

> user    IN A x.x.x.x
> user    IN TXT "v=spf1 ip4:x.x.x.x -all"

This should work.
 
> but since x.x.x.x already has another hostname, a request for two
> hostnames to a single IP has been refused in the recent past.

Refused by who? This is perfectly legal:

user      IN A x.x.x.x
user      IN TXT "v=spf1 ip4:x.x.x.x -all"
otheruser IN A x.x.x.x  ; Same IP