Before doing any troubleshooting, be sure to upgrade to the
latest version of MDaemon from the download page.

What are the minimum system requirements for MDaemon? Can I host Multiple Domains? How do I enter the MDaemon registration key? Why do I receive an 'Invalid IP for the requested session' when using WorldClient? I am listed on a black list, what do I have to do to get off the blacklist? What are the suggested SPAM blocker hosts to use with MDaemons Spam Blocker? Why do I receive Winsock error 10048? Why do I receive Winsock error 10049? What does Winsock Error 10061 mean? How do I move MDaemon to a new machine? Why won't MDaemon start after moving it to a new machine? Why does the envelope icon in the system tray change colors? What is SPF? How do I disable the Update Checker in MDaemon? How can I get WorldClient's logs to roll over each day? How can I share Bayesian Knowledge from one MDaemon server with another server? How do I switch MDaemon from using a dial up connection to a static connection? What are strong passwords? Why is MDaemon flagging all my mail as spam?