Security Basics mailing list archives
Re: Sorbs.net DNS Blacklist
From: Dale Fay <dalef () merit edu>
Date: Mon, 13 Mar 2006 14:55:39 -0500
However, since bounce messages *are* required by RFC821, it seems to me that outfits like sorbs.net need to therefore cultivate some expertise in differentiating faked bounces from the real thing. I suspect that sending a message to the allegedly bouncing address and examining the response, if any, would be pretty conclusive.
RFC821 is now obsolete and replace by RFC2821. RFC2821 says that undeliverable mail can be bounced or rejected. If you send message instead of rejecting it at the time of the SMTP connection, you risk being blacklisted or flooding an innocent third party with spam. --------------------------------------------------------------------------- EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE The Norwich University program offers unparalleled Infosec management education and the case study affords you unmatched consulting experience. Tailor your education to your own professional goals with degree customizations including Emergency Management, Business Continuity Planning, Computer Emergency Response Teams, and Digital Investigations. http://www.msia.norwich.edu/secfocus ---------------------------------------------------------------------------
Current thread:
- Re: Sorbs.net DNS Blacklist, (continued)
- Re: Sorbs.net DNS Blacklist Greg Armer (Mar 10)
- Re: Sorbs.net DNS Blacklist Alvin Oga (Mar 10)
- Re: Sorbs.net DNS Blacklist Devdas Bhagat (Mar 13)
- RE: Sorbs.net DNS Blacklist Kelly Winters (Mar 13)
- Re: Sorbs.net DNS Blacklist Daniel Gil (Mar 13)
- Re: Sorbs.net DNS Blacklist Devdas Bhagat (Mar 13)
- RE: Sorbs.net DNS Blacklist Dan Denton (Mar 10)
- Re: Sorbs.net DNS Blacklist Facekhan (Mar 13)
- RE: Sorbs.net DNS Blacklist Corey Watts-Jones (Mar 14)
- RE: Sorbs.net DNS Blacklist David Gillett (Mar 13)
- Re: Sorbs.net DNS Blacklist Dale Fay (Mar 13)
- RE: Sorbs.net DNS Blacklist Dan Tesch (Mar 13)
- Re: Sorbs.net DNS Blacklist John Mason Jr (Mar 13)
- Re: Sorbs.net DNS Blacklist Devdas Bhagat (Mar 13)
- Re: Sorbs.net DNS Blacklist Facekhan (Mar 13)
- Re: Sorbs.net DNS Blacklist jfvanmeter (Mar 10)
- RE: Sorbs.net DNS Blacklist Beilin Zhang (Mar 10)
- RE: Sorbs.net DNS Blacklist Joseph (Mar 13)
- RE: Sorbs.net DNS Blacklist Dan Denton (Mar 13)
- RE: Sorbs.net DNS Blacklist Jason Williams (Mar 14)
- Re: Sorbs.net DNS Blacklist Devdas Bhagat (Mar 15)
- Re: RE: Sorbs.net DNS Blacklist souldream (Mar 15)
(Thread continues...)