How to use a MailAvenger smart host on Mac OS X (Postfix) Problem You want to configure Postfix on Mac OS X (Snow Leopard in this case) to use a smart host. This is hard enough in itself, but once you think you're all set, you get "501 base64 decoding error" from MailAvenger. Keywords Postfix, MailAvenger, SASL, DIGEST-MD5, CRAM-MD5, TLS, SSL, Mac, Snow Leopard, Mac OS X 10.6. Solution There are v