nanog mailing list archives
Re: VerizonWireless.com Mail Blacklists
From: Steve Sobol <sjsobol () JustThe net>
Date: Thu, 19 May 2005 22:05:28 -0700
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 / sjsobol () JustThe net / PGP: 0xE3AE35ED "The wisdom of a fool won't set you free" --New Order, "Bizarre Love Triangle"
Current thread:
- VerizonWireless.com Mail Blacklists Crist Clark (May 19)
- Re: VerizonWireless.com Mail Blacklists Steve Sobol (May 19)
- Re: VerizonWireless.com Mail Blacklists Steve Sobol (May 19)
- RE: VerizonWireless.com Mail Blacklists Dennis Dayman (May 20)
- Re: VerizonWireless.com Mail Blacklists Crist Clark (May 27)
- Re: VerizonWireless.com Mail Blacklists Rich Kulawiec (May 31)
- Re: VerizonWireless.com Mail Blacklists John Levine (May 31)
- Re: VerizonWireless.com Mail Blacklists Suresh Ramasubramanian (May 31)
- Re: VerizonWireless.com Mail Blacklists Steve Sobol (May 19)