nanog mailing list archives
Re: backscatter hosts
From: John Capo <jc () irbs com>
Date: Wed, 19 May 2004 12:18:56 -0400
Quoting Steven Champeon (schampeo () hesketh com):
It's not really my business why a hotmail.com MX accepted mail it couldn't deliver. I could care less /why/. It's up to hotmail to fix their systems - I don't care how they perform that background check on quota.
Exactly.
It's my business that over the past sixty days, we've had to reject over 23K of these, and had rejected some 130K in three weeks during March, at the peak of the joe job. At one point, backscatter accounted for 70% of my inbound email traffic on one host. Almost made the usual spam and virus look like background noise.
36K backscatter rejects from hotmail yesterday but only 2K from AOL. AOL has really got their act together compared to hotmail, verizon, comcast, and the like. May 18 00:00:05 mx1 postfix/smtpd[11977]: 6F8F315DC0: reject: RCPT from mc1-s21.bay6.hotmail.com[65.54.163.161]: 550 <xjlljuzisexmj () tuffmail co uk>: Recipient address rejected: User unknown; Probably forged by Alan Ralsky; from=<> to=<xjlljuzisexmj () tuffmail co uk> proto=ESMTP helo=<mc1-s21.hotmail.com> It was 80K daily from hotmail till I dropped the MX records for 4 of the domains being forged. If anyone would like to test their capability to reject 1+ million a day I can point the MX records to your servers. :-) John Capo Tuffmail.com
Current thread:
- Re: Barracuda Networks Spam Firewall, (continued)
- Re: Barracuda Networks Spam Firewall Todd Vierling (May 18)
- Re: Barracuda Networks Spam Firewall Eric A. Hall (May 18)
- Re: Barracuda Networks Spam Firewall Per Gregers Bilse (May 18)
- Re: Barracuda Networks Spam Firewall Eric A. Hall (May 18)
- Re: Barracuda Networks Spam Firewall Per Gregers Bilse (May 18)
- Re: Barracuda Networks Spam Firewall Todd Vierling (May 18)
- backscatter hosts Chris Edwards (May 18)
- Re: backscatter hosts Steven Champeon (May 18)
- Re: backscatter hosts Christopher X. Candreva (May 18)
- Re: backscatter hosts Steven Champeon (May 18)
- Re: backscatter hosts John Capo (May 19)
- Re: Barracuda Networks Spam Firewall Christopher X. Candreva (May 18)
- Re: Barracuda Networks Spam Firewall Christopher X. Candreva (May 18)
- Re: Barracuda Networks Spam Firewall Valdis . Kletnieks (May 18)