On 2006-03-30, Peter Bowyer <[EMAIL PROTECTED]> wrote: > You're right, it wouldn't use callouts. But instead, it has a closed > community of known senders for whom it relays, and it can safely > assume that none of them is forging its sender address - so if it gets > a rejection on a relayed message, it can return it to the sender > knowing that the sender address is genuine.
I think you're saying that MTA(n-1) should be confident that it is handling mail with good senders' addresses, although it can't know about the recipients' addresses, whereas MTA(n) can distinguish good and bad recipients' addresses and has to assume that MTA(n-1) has checked the senders' addresses. Now when we say "senders' addresses", which headers are we talking about? For example, I send mails from my home computer with various from-addresses (mainly one for work and one for personal stuff), none of which is associated with my ISP. -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
