nanog mailing list archives
Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism]
From: "Steve Thomas" <nanog2 () sthomas net>
Date: Wed, 12 Apr 2006 10:16:53 -0700 (PDT)
I haven't seen any succinct justification for providing a 550 message rejection for positively-identified spam versus silently dropping the message. Lots of how-to instructions but no whys.
RFC 2821? ...the protocol requires that a server accept responsibility for either delivering a message or properly reporting the failure to do so. ... If an SMTP server has accepted the task of relaying the mail and later finds that the destination is incorrect or that the mail cannot be delivered for some other reason, then it MUST construct an "undeliverable mail" notification message and send it to the originator of the undeliverable mail (as indicated by the reverse-path). Unless you're the final recipient of the message, you have no business deleting it. If you've accept a message, you should either deliver or bounce it, per RFC requirements.
Current thread:
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism], (continued)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Sullivan (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Joe Maimon (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Black (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Suresh Ramasubramanian (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Black (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Suresh Ramasubramanian (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Black (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Joe Maimon (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Henry Yen (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Joe Maimon (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Sullivan (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Tony Finch (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Steve Thomas (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Valdis . Kletnieks (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Black (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Steve Thomas (Apr 12)
- Re: Spam filtering bcps Bryan Bradsby (Apr 12)
- Re: Spam filtering bcps Valdis . Kletnieks (Apr 12)
- Re: Spam filtering bcps Andy Smith (Apr 13)
- Re: Spam filtering bcps Matthew Black (Apr 12)
- Re: Spam filtering bcps Matthew Sullivan (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Matthew Sullivan (Apr 12)
- Re: Spam filtering bcps [was Re: Open Letter to D-Link about their NTP vandalism] Edward B. DREGER (Apr 12)