[Spamassassin Wiki] Update of "OtherTricks" by MichaelHeiming

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

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  '''qmail:'''  Jon Lewis wrote smtp-delay; banner-delay code for the qmail MTA, with whitelisting capabilities among other extremely useful features... http://www.lewis.org/smtp-delay/ (Jeremy Eder)
  
+ '''exim:''' Marc Merlin wrote exim-sa, running SA during smtp time. With adjustable greylisting and a bunch of other useful features like teergrubing. IMHO Exim + exim-sa offer the most sophisticated Spam controll any MTA has to offer... http://marc.merlins.org/linux/exim/sa.html
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  === 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.