Wietse, out of curiosity and completely ignoring the fact that you probably have other things on your mind:
Have you ever had a look at LEMONADE <http://www.lemonadeformobiles.com/index.html> and the protocol extensions it defines for SMTP (e.g. BURL, CHUNKING, BINARYMIME) and have you considered to add those functionalities to Postfix? p...@rick -- All technical questions asked privately will be automatically answered on the list and archived for public access unless privacy is explicitely required and justified. saslfinger (debugging SMTP AUTH): <http://postfix.state-of-mind.de/patrick.koetter/saslfinger/>