nanog mailing list archives
Re: anybody here from verizon's e-mail department?
From: Joe Maimon <jmaimon () ttec com>
Date: Wed, 22 Feb 2006 11:35:06 -0500
Dave Pooser wrote:
Which probably means Paul is blocking whatever server Verizon is usingfor itssender verificationSomething I've seen before is a lot of mail servers will wait 10-45 seconds before presenting an SMTP prompt to remote hosts; spambots typically won't wait that long and give up. But since Verizon's sender verification (as of a couple months ago; haven't checked recently) times out after 30 seconds, that technique can have the side effect of making Verizon customers unreachable.
What about sender verification of validity discourages spammers?The only reason it works is that they are too lazy to actualy use some random VALID forged return-path.
I for one would not like to force spammers to start using valid return-paths. I dont need that blowback load. That would affect my ability to read NANOG, hence its on-topicness.
IOW why isnt this technique (not pionered by verizon, afaik the milter-sender was first I saw of it) short sighted and dangerous in the long run?
And yes, put this together with sender-id/domainkeys/spf whathaveyou and then its valuable. However thats not the world we live in now.
Joe
Current thread:
- anybody here from verizon's e-mail department? Paul Vixie (Feb 21)
- Re: anybody here from verizon's e-mail department? Martin Hannigan (Feb 21)
- Re: anybody here from verizon's e-mail department? Randy Bush (Feb 21)
- RE: anybody here from verizon's e-mail department? Wayne Gustavus (nanog) (Feb 21)
- RE: anybody here from verizon's e-mail department? Dennis Dayman (Feb 21)
- RE: anybody here from verizon's e-mail department? Dennis Dayman (Feb 21)
- Re: anybody here from verizon's e-mail department? Suresh Ramasubramanian (Feb 21)
- RE: anybody here from verizon's e-mail department? Wayne Gustavus (nanog) (Feb 22)
- Re: anybody here from verizon's e-mail department? Dave Pooser (Feb 22)
- Re: anybody here from verizon's e-mail department? Joe Maimon (Feb 22)
- Re: anybody here from verizon's e-mail department? Suresh Ramasubramanian (Feb 22)
- Re: anybody here from verizon's e-mail department? Christopher L. Morrow (Feb 22)
- Re: anybody here from verizon's e-mail department? Suresh Ramasubramanian (Feb 22)
- Re: anybody here from verizon's e-mail department? Suresh Ramasubramanian (Feb 21)
- Re: anybody here from verizon's e-mail department? Martin Hannigan (Feb 21)