On Tue, Nov 14, 2006 at 01:52:26PM +0000, K.J. Petrie (Instabook) wrote:
Bouncing/Not bouncing isn't an SPF issue. It's an operations issue. With
the limited exception of to verified sending addresses (e.g. SPF Pass, but
bounced for other reasons), no one should send bounces. The designed
behavior is to reject the message during SMTP, so there is no bounce
backscatter.
Scott K
I agree. (However, I have had mail bounced to me because it failed SPF at the
recipient's mailbox, so some ISPs do.)
If a message is accepted, anywhere in the chain, and if the next hop refuses
to accept the message (due to SPF or otherwise), a bounce is generated by the
host that accepted the message in the first place (not by the host refusing
to accept it).
Several DSL and/or Cable providers happily accept anything their users
submit to them, and then these providers send a bounce "back" to a
victim in stead of dealing with their own abusive user themselves.
Worse, due to the amount of complaints, they close their abuse mailbox.
Alex
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