[Current version of MDaemon is 11.03]

MDaemon email server for Windows comes in Standard, Professional, and Free versions. The chart below shows the major differences between the three versions of MDaemon to assist in matching requirements.

Services	MDaemon Free	MDaemon Standard	MDaemon Pro
Maximum Accounts	5	50	Unlimited
POP3
SMTP
DomainPOP
MultiPOP
IMAP:
Server-hosted pulic IMAP folders with Access Control Lists (ACL)
IMAP mail filtering rules
Shared IMAP folders with Access Control Lists (ACL)
Remote Administration via WebAdmin
WorldClient web mail anywhere access
New Mail Notification via ComAgent for MDaemon
Calendar Server
Free/Busy server
Secure Instant Messaging Server with logging via ComAgent for MDaemon
SyncML server
Local address book synchronization via ComAgent for MDaemon
Account validation using Minger server
SSL/TLS/StartTLS
Mailing Lists:	1:20 Users	5:50 Users	Unlimited
Digests
Subscribe/Unsubscribe support
Moderator options
Post-only / Read-only access
Archiving
ODBC support
Active Directory© support
Mobile Access:
Internet access to email and contacts via WorldClient
Wireless access to email (via POP3)
Internet access to email, contacts, calendar, notes and tasks via WorldClient
Wireless access to email, contacts, calendar and tasks via WorldClient, Outlook Connector for MDaemon ¹, IMAP and SyncML
Windows Mobile® / PocketPC®, BlackBerry®, Symbian OS, Palm OS, and iPhone compatible
WAP/XHTML-compatible phones - access to email via WorldClient
SyncML-compatible phones - access to contacts, calendar and tasks via WorldClient
ActiveSync for Outlook synchronization at the desktop (Windows Mobile® / PocketPC®) (Requires Outlook Connector for MDaemon Plugin)
KeySuite for Outlook synchronization at the desktop (Palm OS) (Requires Outlook Connector for MDaemon Plugin)

Accounts	MDaemon Free	MDaemon Standard	MDaemon Pro
Permanently or temporarily scheduled auto-responders
Automatic mail forwarding
Account Groups
Account Quotas
Account-based signature files
Account Restrictions
Aliases
Aliases with wildcards

Spam Filtering	MDaemon Free	MDaemon Standard	MDaemon Pro
Anti-spam server
Heuristic Messaging Scoring
Bayesian Classification and Scoring
Recurrent Pattern Detection™ (via SecurityPlus plugin)
Spam Traps

Virus Filtering	MDaemon Free	MDaemon Standard	MDaemon Pro
Kaspersky AV engine (via SecurityPlus plug-in)
Zero Hour™ detection (via SecurityPlus plug-in)

Web Mail and Groupware	MDaemon Free	MDaemon Standard	MDaemon Pro
Calendar folders
Contact folders
Notes folders
Folder sharing
Free/busy support
Meeting requests
Microsoft Outlook® integration

Content Based Filtering	MDaemon Free	MDaemon Standard	MDaemon Pro
Scriptable content filtering
Attachment restriction
Attachment compression

Security: IP / DNS Based	MDaemon Free	MDaemon Standard	MDaemon Pro
IP shielding
Trusted IPs and hosts
PTR, HELO and MAIL reverse lookup validation
DNS Blacklists

Security: Suppression Based	MDaemon Free	MDaemon Standard	MDaemon Pro
Address blacklists
Host screening
IP screening

Security: Activity Based	MDaemon Free	MDaemon Standard	MDaemon Pro
Tarpitting
Dynamic DoS, dictionary and brute force attack detection and prevention
Bandwidth throttling
Greylisting
HashCash

Security: Authentication Based	MDaemon Free	MDaemon Standard	MDaemon Pro
Strong password support
SenderID
SPF (Sender Policy Framework)
Vouch-by-Reference (VBR) Message Certification
DKIM (DomainKeys Identified Mail) signing and verification
DomainKeys signing and verification

Security: Verification Based	MDaemon Free	MDaemon Standard	MDaemon Pro
Anti-relaying
SMTP Authentication
POP before SMTP
Minger recipient verification
LDAP recipient verification
Backscatter protection

System / Administration	MDaemon Free	MDaemon Standard	MDaemon Pro
Real-time session activity logging
Domain-based signature files
Low disk space alert notifications
New Account templates with automatically-configured setting
Account import/export
SMTP greeting "site policy" support
Automated old mail and inactive account deletion
Comprehensive message logging
SMTP data transfer limits
Configurable storage locations
Remote Access Services (RAS)
Configurable mail port, protocol timeout, and session inactivity values
Delivery of mail directly to recipients' mail server or to recipients' ISP
Plug-in support
Simplified (on/off) message archiving
Catalogs — Script server to email files to users upon request
Multiple mail domains
Domain sharing: split domain to multiple servers
Archiving to Public Folders
Attachment linking for quick mobile message downloads
ComAgent for MDaemon secure Instant Messaging and Mail Access client
Support for multiple mail queues
Unlimited mail delivery schedules
Active Directory™ integration
LDAP account database backend support
ODBC account database backend support
Automatic configuration when used in a backup MX role
Gateways - perfect solution for a backup MX role