nanog mailing list archives
Re: Barracuda Networks Spam Firewall
From: "Majdi S. Abbas" <msa () samurai sfo dead-dog com>
Date: Tue, 18 May 2004 10:11:20 -0700
On Mon, May 17, 2004 at 02:26:37PM -0700, Jared B. Reimer wrote:
This is a pretty serious flaw IMHO, if it is (in fact) true. qmail isn't the only mailer that behaves this way. It looks like they may have tried to kludge their way around this with LDAP in the case of MS Exchange, which also does asynchronous bouncing of undeliverable mail IIRC.
Quite frankly, I'm at a loss as to why anyone would wish to accept and queue mail that they cannot deliver. Queuing everything just allocates disk unnecessarily and results in a lot of delayed bounce backscatter, almost always directed at a third party (in the common case of spoofed from: headers). Accepting everything simply because you don't wish to give away valid addresses doesn't work; the spam bots just jabber more loudly at you. In the past year I've had two domains joe jobbed, generating thousands of those helpful delayed bounce messages per hour for my role accounts. If, after RCPT TO, you do not have a valid destination, just refuse it. My role accounts thank you. --msa
Current thread:
- Re: Barracuda Networks Spam Firewall, (continued)
- Re: Barracuda Networks Spam Firewall Martin Hepworth (May 18)
- Port 5000 Geo. (May 18)
- Re: Port 5000 Erik Haagsman (May 18)
- Re: Port 5000 Doug White (May 18)
- Re: Port 5000 James Reid (May 18)
- Re: Barracuda Networks Spam Firewall Jared B. Reimer (May 17)
- Re: Barracuda Networks Spam Firewall Jared B. Reimer (May 17)
- Re: Barracuda Networks Spam Firewall jlewis (May 17)
- Re: Barracuda Networks Spam Firewall Majdi S. Abbas (May 18)
- Re: Barracuda Networks Spam Firewall Valdis . Kletnieks (May 18)
- Re: Barracuda Networks Spam Firewall Christopher X. Candreva (May 18)
- Re: Barracuda Networks Spam Firewall Valdis . Kletnieks (May 18)
- Re: Barracuda Networks Spam Firewall Todd Vierling (May 18)
- Re: Barracuda Networks Spam Firewall Christopher X. Candreva (May 18)
- Re: Barracuda Networks Spam Firewall Valdis . Kletnieks (May 18)
- Re: Barracuda Networks Spam Firewall Todd Vierling (May 18)