Benny Pedersen wrote:
On Tue, May 6, 2008 23:06, mouss wrote:you rely on the sender address, make sure to reject it in your smtpd (you don't want to give spammers an open road).that was why i sugested spf
blocking a sender in postfix is trivial. adding SPF support requires additionnal software (and configuration...).
also, he can block a set of "internal/reserved" senders, and still allow the domain (In contrast, SPF applies to the whole domain).
