I really owe a big one to Ralf Hildebrandt and Tuomo "One tree" Soini for reading the HOWTO not only once. They provided lots of useful feedback and corrected my misunderstandings without flaming me to death ;-)
Along with them there were Flavio Boniforti, Tom Thomas and Paul (p dont think) who already used parts of this HOWTO when deploying SMTP AUTH to their Postfix server. From them I learned that still things were missing when I thought everything had been said.
Help me improve this HOWTO and send me your feedback to <firstname.lastname@example.org>.
“Ein Tag im All ist kein Alltag!” (A day in space isn't daily routine) and so is writing a HOWTO... :-)