nanog mailing list archives
Re: Spamhaus...
From: Scott Howard <scott () doc net au>
Date: Fri, 19 Feb 2010 21:28:41 -0800
On Fri, Feb 19, 2010 at 5:20 PM, William Herrin <bill () herrin us> wrote:
On Fri, Feb 19, 2010 at 3:30 PM, Rich Kulawiec <rsk () gsp org> wrote:Barracuda's engineers apparently think that using SPF stops backscatter -- and it most emphatically does not. Reject gooooood, bounce baaaaaaad. [1]Whine all you want about backscatter but until you propose a comprehensive solution that's still reasonably compatible with RFC 2821's section 3.7 you're just talking trash.
In the case of Barracuda's long history of Backscatter the solution is simple, and is implemented by most other mail vendors - it's called "Don't accept incoming mail to an invalid recipient". Barracudas used to have no way of doing address validation for incoming mail, so they would accept it and then bounce it when the next hop (eg, the Exchange server) rejected the recipient address. They finally fixed this a few years ago, and can not integrate with LDAP (and possibly others) for address validation. Of course, it's still down to the admin to implement it... Scott.
Current thread:
- Re: Spamhaus..., (continued)
- Re: Spamhaus... Rich Kulawiec (Feb 19)
- Re: Spamhaus... Michelle Sullivan (Feb 19)
- Re: Spamhaus... Bjørn Mork (Feb 19)
- Re: Spamhaus... Michelle Sullivan (Feb 19)
- Re: Spamhaus... Rich Kulawiec (Feb 19)
- Re: Spamhaus... William Herrin (Feb 19)
- Re: Spamhaus... Larry Sheldon (Feb 19)
- Re: Spamhaus... William Herrin (Feb 19)
- Re: Spamhaus... Randy Bush (Feb 19)
- Re: Spamhaus... William Herrin (Feb 19)
- Re: Spamhaus... Scott Howard (Feb 19)
- Re: Spamhaus... Scott Howard (Feb 19)
- RE: Spamhaus... Frank Bulk (Feb 20)
- Re: Spamhaus... John Peach (Feb 20)
- Re: Spamhaus... Daniel Senie (Feb 20)
- Re: Spamhaus... Valdis . Kletnieks (Feb 20)
- Re: Spamhaus... Michelle Sullivan (Feb 20)
- Re: Spamhaus... Rich Kulawiec (Feb 20)
- Re: Spamhaus... Daniel Senie (Feb 20)
- Re: Spamhaus... Valdis . Kletnieks (Feb 20)
- Mail Best Practices and Documentation (was Re: Spamhaus...) Larry Sheldon (Feb 20)