Robert Fitzpatrick wrote:
I have double-bounce messages in the queue, not sure what that is all about. For instance, to Yahoo addresses. Is this related to the fact that I am doing AV to those addresses?
Recent postfix versions use the double-bounce address as the sender of address probes.
Sender address verification should be used carefully and selectively - some sites will consider probes to non-existent addresses a dictionary attack and block you.
-- Noel Jones
