Hi All, I've found a message from 2006 where a possible "patch" was mentioned that could be applied to allow underscores in hostnames. http://www.spinics.net/lists/info-cyrus/msg01349.html The problem I am facing is similar, but not caused on my end. I keep getting messages about failed deliveries for 1 individual having an "underscore" in the domain name. I don't know what the current situation is with regards to underscores, but I believe these are still not allowed? Is there a setting in cyrus that can allow these to be at least delivered to my inbox? Or will I need to patch the code manually each time a new version is released? Any ideas would be greatly appreciated. Thanks, Joost ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/