Re: incorrect spam setups cause spool messes on forwarders

["Steven M. Bellovin" <smb () research att com>]

In message <10021859.1070281409 () d216-220-25-60 dynip modwest com>, Michael Loft
is writes:
> I personally haven't seen ANY validation, just an arbitrary block that's 
> been in place for over a month without cause, reason, or even any ability 
> to contact them. 

Right.  Assuming that the described validation scheme is, in fact, 
what's being used, you'd expect Verizon's mailer to retain and cache 
the validation.  That way, a single 450 can be turned into a 200 series
or a 550.

As Randy said, 450 means "there's a problem here that should be fixed 
soon; come back later".  If it doesn't change, it's not a 450.

                --Steve Bellovin, http://www.research.att.com/~smb