North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: VerizonWireless.com Mail Blacklists

  • From: Steve Sobol
  • Date: Fri May 20 01:06:32 2005 
Crist Clark wrote:


It appears VerizonWireless.com has some rather aggressive mail filters.
Verizon.net's blocking of Europe, Asia, Africa... well, everything but
North America has made some headlines and even some lawsuits. Anyone
know if VerizonWireless.com and Verizon.net are independent operations
from an SMTP point of view? Verizon.net has,

    http://verizon.net/whitelist

And I haven't found an equivalent for VerizonWireless.com. And given
the differences in Verizon.net's and VerizonWireless.com's MX setup,
I doubt they use common resources.
They're different companies. I'm pretty sure they have different server farms and corporate policies. Verizon owns 100% of Verizon.net and only 55% of Verizon Wireless.

But that's not to say they don't share information.

I'm going to forward this to an acquaintance I have at Verizon.net and see what he says.

FWIW, it really looks like an IP-based blacklist. From our main mail
server to any of their MX hosts, the 25/tcp connection completes, but
then their server drops the connection, no banner, no nothing. I get
a banner and can send mail to their servers from other IP addresses
outside of that network. My guess is that they're using SPEWS? We're
collateral damage in a SPEWS block.

I'll find out for you (hopefully).

--
JustThe.net - Apple Valley, CA - http://JustThe.net/ - 888.480.4NET (4638)
Steven J. Sobol, Geek In Charge / [email protected] / PGP: 0xE3AE35ED

"The wisdom of a fool won't set you free"
    --New Order, "Bizarre Love Triangle"