On Fri, 2003-05-16 at 13:16, Steve Crook wrote: [...] > I can appreciate the benefits of MMTP over SMTP as a delivery method, but are > the defences it provides up to the challenge of a frequently unfriendly user > community? In two words: not yet, but this is a really interesting issue. :) In the future (post 0.0.4, maybe some for 0.0.5), we'll have filtering incoming MMTP by incoming IP address, pushing back on message delivery when our disk is full, and more sophisticated behavior about dropping undeliverable messages when we're under heavy load. Final delivery goes through SMTP, so *there* you can use whatever filtering techniques you already have. We have a pretty nice set of exit-address filtering features now, but they can get better as needed. So, I put your question back to you, and to the list: *are* these defenses up to the challenge? What *other* filtering and MTA features do current remops use to prevent abuse and DoS? We should definitely draw on the experiences of today's operator community, and not enter the arms race undermatched. Yrs, -- Nick
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