Re: Daniel Lorch
In your referenced message to SwiNOG
http://www.mail-archive.com/swinog%40swinog.ch/msg03741.html you wrote that you
have set your ~21k customer's domain's SPF records to:
"v=spf1 mx ?all"
Do you have a strategy in mind for adjusting those SPF records so that the ?all
can be changed to -all ?
As it stands, you have ~21k SPF records that are only slightly helpful. The
real power of SPF doesn't (in my understanding) come into play until the record
can confidently state -all.
Your customers may feel, falsly, that their SPF obligations are taken care of
with the records you have set. They still need to be sending and relaying email
in an SPF compatible way and to get their records to -all.
Mark Holm
mdholm(_at_)telerama(_dot_)com