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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Distributed Dictonary email slam
On Sun, Sep 05, 2004 at 07:58:06PM -0400, Christopher X. Candreva wrote: > > On Sun, 5 Sep 2004, Matt Hess wrote: > > > source hosts.. Now being as we are a secondary mx I'm dropping their record > > out of our email system as I write this, however, I am curious if other have > > gone through or are currently going through something of this magnitude (12K > > spam/dictionary msgs per hour destined to one domain and that's just what is > > You want to keep a list of valid accounts on the secondary so you can refuse > mail for non-existing accounts on the secondary too. > > If you don't care about yourself -- relize that if, say, all of these mails > have a return address forged from the same domain, you will be DOSing THAT > site with the bounce messages. This is enough for some people to block mail > from you. does anyone have some pointers to a good (possibly radius+sendmail) based approach for checking this? i'd like to have my backup mx host reject mail for non-existant users/aliases as long as the primary is up, but if it's down, it should accept them and queue, plus possibly cache misses for a period of time (24h?) - jared -- Jared Mauch | pgp key available via finger from [email protected] clue++; | http://puck.nether.net/~jared/ My statements are only mine.
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