4 Sep
2013
4 Sep
'13
4:50 a.m.
Scott Howard wrote:
The idea of this header is that it will allow a sender to control that a
Sender has no control and asks a receiver perform some control, which may be ignored by the receiver.
user will only receive an email if that email address was valid before a specific date, thus at least stopping someone from using a recycled account to carry out a password reset on another service.
It does not work as protection against transferred domain.
Facebook at least is already sending this header on all emails.
Someone might want people keep using mail services monitored by USG. Masataka Ohta