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Re: Proposal: Using Conservative EHLO Response Parser Behaviour For Tarpitting

2007-06-18 15:48:00

Hi Sabahattin,
At 13:08 18-06-2007, Sabahattin Gucukoglu wrote:
It would indeed, if it is true that (sensibly-minded) clients choose to
abort a long-running transaction.  That might be a security advantage to
avoid a DoS; I'd certainly recommend people set an upper limit on
lingering connections that aren't actually taking mail, just in case some

That limit can be quite short nowadays to avoid tying server resources. Playing SMTP tricks increases the probability of losing valid mail. Your proposal is interesting. However, it makes debugging more difficult. That in itself is a significant disadvantage in my view.