Re: verizon.net and other email grief

[Crist Clark <crist.clark () globalstar com>]

Krzysztof Adamski wrote:

> On Fri, 10 Dec 2004, Jeffrey I. Schiller wrote:
>
>
> > On Fri, Dec 10, 2004 at 12:26:59PM -0500, Rich Kulawiec wrote:
> >
> > > One thing that's not clear is whether or not Verizon caches any of
> > > this information.
> >
> > It appears that they do some amount of caching.
> >
> >                         -Jeff
>
>
> It does not appear that they are caching it, here is a sample from my log
> file:
>
> Dec  6 19:18:15 white sm-mta[25976]: iB70IF6n025976: <lopqp () abc net>... User unknown
> Dec  6 19:18:15 white sm-mta[25977]: iB70IF6n025977: <lopqp () abc net>... User unknown
> Dec  6 19:18:16 white sm-mta[25976]: iB70IF6n025976: from=<>, size=0, class=0, nrcpts=0, proto=SMTP, daemon=MTA, 
> relay=sc006pub.verizon.net [206.46.170.182]
> Dec  6 19:18:16 white sm-mta[25977]: iB70IF6n025977: from=<>, size=0, class=0, nrcpts=0, proto=SMTP, daemon=MTA, 
> relay=sc019pub.verizon.net [206.46.170.68]
> Dec  6 19:18:16 white sm-mta[25976]: iB70IF6o025976: <lopqp () abc net>... User unknown
> Dec  6 19:18:16 white sm-mta[25977]: iB70IF6o025977: <lopqp () abc net>... User unknown
> Dec  6 19:18:16 white sm-mta[25976]: iB70IF6o025976: lost input channel from sc006pub.verizon.net [206.46.170.182] to 
> MTA after rcpt
> Dec  6 19:18:16 white sm-mta[25976]: iB70IF6o025976: from=<antispam245967 () west verizon net>, size=0, class=0, 
> nrcpts=0, proto=SMTP, daemon=MTA, relay=sc006pub.verizon.net [206.46.170.182]
> Dec  6 19:18:16 white sm-mta[25977]: iB70IF6o025977: lost input channel from sc019pub.verizon.net [206.46.170.68] to 
> MTA after rcpt
> Dec  6 19:18:16 white sm-mta[25977]: iB70IF6o025977: from=<antispam830748 () west verizon net>, size=0, class=0, 
> nrcpts=0, proto=SMTP, daemon=MTA, relay=sc019pub.verizon.net [206.46.170.68]
>
> What happens when verizon tries to send email to somebody who does the same
> type of check, does this not create an infinite loop?

Not if Verizon treats the antispam[0-9]+ mailboxes in a special manner
and answers without a check. And they have to answer that the box exists
or things are gonna _really_ break.

Doing a quick test using the last antispam[0-9]+ address in my SMTP logs,
I got all 250 responses without a more recent call back.
--
Crist J. Clark                               crist.clark () globalstar com
Globalstar Communications                                (408) 933-4387