Update: A lot has happened since I created this tool. Couchsurfing went commercial and recent unprofessional development made it even more chaotic to navigate and use than it was before. Luckily, There is an alternative: http://www.bewelcome.org.
The 'csmailfix' project thus is left abandoned. It still works (more or less) but I won't do anything about it any longer.
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Couchsurfing (www.couchsurfing.org, CS) used to be great way to meet people, invite them at home and find a couch...