Sender ID in the news

Meng Weng Wong wrote:

> I gave him my opinion that it was a good thing that MS's PRA checks could
> reuse v=spf1 records.
If for some reason a domain can do only SES (signed envelope sender) and
publishes the SPF record "v=spf1 exists:%{l}._ses.%{d} -all", then this
works ONLY for MAIL FROM. If a stupid MTA uses this SPF record for the PRA,
then it will always fail and all mail will be rejected.

Roger