nanog mailing list archives

Re: verizon.net and other email grief


From: Krzysztof Adamski <k () adamski org>
Date: Fri, 10 Dec 2004 18:03:11 -0500 (EST)


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?

K


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