[Mailman-Developers] before next release: disable backscatterin default installation

[Mark Sapiro]

Stephen J. Turnbull wrote:

>Jo Rhett writes:
>
> > On Mar 24, 2008, at 6:45 PM, Mark Sapiro wrote:
> > > I still don't get what you mean by "properly deal with DSNs". Are you
> > > saying that an MTA should never return a DSN? It should either reject
> > > the mail during the incoming SMTP transaction or forever hold its
> > > piece?
> > 
> > Yes.  And not just me, but a dozen different blacklists. 
>
>Unfortunately this attitude does seem to be catching hold.  I was told
>recently that a secondary MX would have to stop functioning as such
>because his ISP insists that he have an up to the second list of all
>valid mailboxes at my site; he's not allowed to relay undeliverable
>mail to me *ever*.
>
>So much for the whole concept of a store-and-forward mail system. :-(


Well, it does simplify the MTA's job. Instead of all that queueing and
retrying and such, you just have during SMTP (hold on a minute while I
attempt to deliver this to the next hop and return that result to
you)*N, a system that doesn't seem to scale well. Either that or you
just forget the concept that the originator of a message can ever be
informed of a delivery problem.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan