MDaemon - Version 4.0 MDaemon is a scalable, SMTP/POP3/IMAP4 Email server with LDAP support. With the powerful features of MDaemon Standard, you can collect your networks Email from a single, ISP provided, POP3 account and/or host an entire domain with MDaemons SMTP server. With the increased functionality of IMAP4 and Multiple Domain Support, MDaemon Pro is an ideal Email backbone for Enterprise level organizations.