On 06/15/2012 09:33 AM, John R Pierce wrote: > On 06/15/12 9:25 AM, Shiv. Nath wrote: >> 1.) install& configure fail2ban > each of the connections shown in the log fragment was from a different > IP. how would fail2ban help? > > > If you were to switch to postfix, I believe that postscreen may be able to handle this type of spambot attack. http://www.postfix.org/postscreen.8.html Unless you happen to already be a sendmail guru, my sense is that postfix is easier to configure to deal with these complex situations. Nataraj