----- Original Message -----
From: "Mark Shewmaker" <mark(_at_)primefactor(_dot_)com>
To: <spf-discuss(_at_)v2(_dot_)listbox(_dot_)com>
Sent: Wednesday, August 10, 2005 7:59 AM
Subject: [spf-discuss] Updating SPF type99 and TXT RR's: Simultaneity is not
guaranteed.
...
So basically, even when a domain owner updates both the SPF type99 and
SPF TXT records simultaneously, the mailservers of the recipients may
see different records for a time, (until the cached records' ttl's run
out.)
Possible solution?
1. Lower the TTL of the current record to something like 1 second.
2. After a period as long as the old TTL, change both records. Including
setting the TTL back to the original value.
/Johan