IceWarp Mail Server

IceWarp Server (formerly IceWarp Merak Mail Server) is a proprietary communication solution with the core components of the mail server and groupware, which has implemented many open standards such as OpenLDAP. The entire solution is transferred from European companies IceWarp Ltd.. developed; the sales and support also runs on the IceWarp Ltd..

The server is modular and is also licensed. Therefore, only the modules must be licensed, which are also needed. The following modules are available:

  • Mail Server - MTA, LDAP, POP3, SMTP, and IMAP servers
  • Webmail - Ajax -based webmail
  • Anti-Spam - Anti -spam engine with the core component SpamAssassin and second layer Commtouch
  • Anti- virus - virus scanner on the basis of the Kaspersky engine
  • FTP Server - proprietary FTP server
  • Instant Messaging server - IM server on XMPP ( Jabber ) base
  • Groupware modules - Share of PIM data to other users (Calendar Sharing, Public address, etc.)
  • Outlook Sync - Outlook add-in for the comparison of PIM data between Outlook and IceWarp Server
  • ActiveSync Server for Groupware - ActiveSync Server
  • SyncML server for Groupware - SyncML server
  • CalDAV Server for Groupware - CalDAV server
  • VoIP SIP server - VoIP Solution


  • Get mail via POP3/IMAP
  • Groupware can be used by webmail, Outlook, Thunderbird, smartphones, iCal, and other clients.
  • IPhone and Tablet optimized Webmail
  • LDAP
  • SpamAssassin
  • Push Mail
  • VoIP
  • Instant Messaging server
  • Connection to database systems SQLite, MSSQL, MySQL and Oracle possible
  • ETRN server
  • Static routes
  • API for Developers

Supported protocols

  • IMAPv4 including PUSH via IDLE command
  • POP3/SPOP3
  • APOP
  • HTTP ( S)
  • FTP ( S) with OTP / S Key
  • OpenLDAP
  • Jabber / XMPP
  • HTTP proxy
  • TLS / SSL 128 -bit for all services
  • IPv6
  • SNMPv2
  • WebDAV, GroupDAV, CardDAV and CalDAV
  • SyncML 1.1
  • ActiveSync 14.1
  • OMA DS 1.2
  • VCal, vCard, vNote, and vFreeBusy
  • Quoted/base64 encoding
  • Unicode ( UTF -8)
  • SHA1/MD5/DigestMD5 RSA encryption methods