RE: orbs.org accuses qmail of mailbomb relaying!

[Frank Tegtmeyer]

> The only way for this attack to work is to talk to qmail on a 
> secondary MX (and have primary MX generate 26 distinct 
> bounces), but then the effect of the mailbomb is probably 
> diminished by the (allegedly) poor line between secondary and 
> primary (why would you care about secondary, otherwise?).

Secondaries are not the only case. We for example have a system of chained 
qmail servers with enough bandwith between them. All go through one 
gateway server. All the subdomain systems do not have direct Internet 
access.

Internet  <-->  gateway qmail  <---+--->  subdomain1 qmail
                                   |
                                   |--->  subdomain2 qmail

                                  ...

Regards, Frank