João Miguel Neves wrote:
The SAV check in postfix is done with the postmaster address by default.
Recent postfix (2.5 and newer) use $double_bounce_sender as the default for address_verify_sender. This recipient is always valid, never delivered.
http://www.postfix.org/postconf.5.html#address_verify_senderUsing $double_bounce_sender has been found to cause fewer compatibility problems than "postmas...@example.com" or "<>", which some sites don't like as a sender.
-- Noel Jones
