On Sun, 6 Feb 2011, Stuart D. Gathman wrote:
Doesn't break if the SPF record is properly transitioned. You're right
though that "best guess" would probably break. That is why we promote SPF.
Your hack may still break, because supporting it is not currently a
documented consideration in deciding what to publish.
Say ISP C decides to phase out all use of the ISP A domain, except to
forward mail from the legacy addresses to each customer's new address at
ISP C's domain. Then, since no further legitimate mail is expected to
bear the ISP A domain in the envelope sender, "v=spf1 -all" becomes a
reasonable SPF record for that domain.
---- Michael Deutschmann <michael(_at_)talamasca(_dot_)ocis(_dot_)net>
-------------------------------------------
Sender Policy Framework: http://www.openspf.org [http://www.openspf.org]
Modify Your Subscription: http://www.listbox.com/member/
[http://www.listbox.com/member/]
Archives: https://www.listbox.com/member/archive/735/=now
RSS Feed: https://www.listbox.com/member/archive/rss/735/2183229-668e5d0d
Modify Your Subscription:
https://www.listbox.com/member/?member_id=2183229&id_secret=2183229-a7234b15
Unsubscribe Now:
https://www.listbox.com/unsubscribe/?member_id=2183229&id_secret=2183229-98aa0fe6&post_id=20110208045329:5E20630E-3369-11E0-860F-A8BBF559ED1D
Powered by Listbox: http://www.listbox.com