Email Lists wrote: > -> [...] > -> Looks to me that SpamAssassin is taking to long to process the > -> incoming emails, and as result, it is slowing down the server, and > -> finally causing the DoS. > [...] > > The first thing to do is relieve some of the load. To do this we need better > mail gate keeping. > > Find and run the proper and right greylisting function for your server. That > will swat away some of the bursty sp*mmers. > > Then the next thing to do is implement a function we call validrcptto which, > rejects emails to nonexistent email addresses at the smtp level. > > Those two things alone will help a lot. > > If you do not do those two things, start there. > > Increasing the amount of spamd child processes may not be the correct > initial answer... that can eat up the RAM and put you into heavy swap. > > Ummmmm if you are in a position to, add a bunch more RAM to the server. > > Then later, when you are ready and if it will accept it, add a second proper > mate of a processor and go DUAL. > > Don't forget to check all your logs, you will get other valuable hints to > help deal with issues. > > Let us know how it turns out.
Thanks Robert, I have requested more memory and an additional processor for the server, hope they give me something... I will be working with the Greylisting and validrcptto, and let you know how it goes. Thanks again, BR, Matias.
