[Spamassassin Wiki] Update of "OtherTricks" by MichielKlaver

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The following page has been changed by MichielKlaver:
http://wiki.apache.org/spamassassin/OtherTricks

The comment on the change is:
added sendmail delay hint

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  '''exim:''' Marc Merlin wrote exim-sa, running SA during smtp time. With adjustable teergrubing. IMHO Exim + exim-sa offer the most sophisticated Spam controll any MTA has to offer... http://marc.merlins.org/linux/exim/sa.html
  
+ '''sendmail''' Sendmail already has a built in feature to enable delays, it is called greet_pause and you could add this line to your sendmail.mc config file to enable a 5 second delay: FEATURE(`greet_pause', `5000')
+ 
  === Policy Daemons ===
  
  Some MTAs such as postfix 2.1 and later can delegate a spam/ham decision to a policy server at any stage, i.e. before DATA or after. Before DATA, i.e. at RCPT TO stage has advances in such, that multirecipient mail remains intact and that it is possible to let the user decide whether or not to use the policy daemon. One example with greylisting, throttling, etc pp would be policyd: http://policyd.sourceforge.net/ another example, which acts like a mini-SpamAssassin but before the content has been received (i.e. at RCPT TO stage) would be policyd-weight: http://www.policyd-weight.org/ . Both can drastically reduce your bandwidth and CPU-Cycles and other MTA resources.