Re: Bounce/System Notification Address Verification

On Mon, 27 Jun 2005 12:38:42 EDT, Hector Santos said:

> What is the BCP for allowing multiple RCPT TO when the return path is NULL?
In general, since the message that's sent with the null MAIL FROM generates
the RCPT TO from the inbound MAIL FROM, and there's only one of those, then
you can only get one outbound RCPT TO.

The problem of course, is that sometimes, things generate bounces or 
pseudo-bounces
from something other than the inbound MAIL FROM (for instance, LSoft's Listserv
sends a lot of things that aren't technically DSNs, but *should* be treated
as "drop rather than bounce" - for example, the automated cookies for
subscription confirmation, etc.  If they get routed to an invalid mailbox, we
want them to be dropped on the floor, as the cookie will be expired via other
means anyhow..

> Don't most system use accept one recipient for a null return path?
I believe that most systems don't actually *verify* it has exactly one
RCPT TO, unless it's an aftermarket add-on.

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