I've been playing with Trixbox and Elastix for a little while now. This has been my only experience with *nix, but I've learned a bit over the past year. I was having issues with Trixbox so I moved to ...
Have you tried checking to see if postfix was built with SASL support? postfix -A I believe. According to the readme that comes with the source RPM, you need to do all this explicitly to enable SASL ...