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Simple HTTP(S), HTTP reverse and IMAP and POP3 proxy sWeb server that supports HTTP(S), IMAP and POP3; can be used with websocket support as a reverse proxy; provides a gunzip-module; compressed web pages can be unpacked before being delivered to the browser.

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Multi-protocol mail and groupware server that supports ESMTP, SMTP, IMAP and POP3. Includes a compact web front end with a basic calendar. Fast and secure download from The H

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Rule-based anti-spam and anti-virus server with up-to-date recognition functions such as SpamAssassin, SPF, grey listing, receiver verification, and OCR; extended versions available.

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Used to exchange messages, appointments, contacts and documents. Supports cooperative working in teams or departments. Client available for a range of Linux, Windows and Mac OS versions. Includes an optimised web front end (compatible with HTML, WAP, HDML and WML) for mobile access. Download requires registration.

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Effective spam filter for a server. Analyses mail headers and content using a Bayesian filter, DNS blacklists and a filter database.

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SyncML server that provides an email push service, data synchronisation and administration functions for mobile devices. Client plug-ins available for Palms, BlackBerrys or iPods. Also available as complete server bundles for Windows and Linux with all the important components.

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This tool acts as an SMTP proxy server and filters all your email traffic before it reaches the actual server. Includes adaptive Bayes recognition, an SPF scan, your own honeypot and RBL (Real-time Blackhole List) check. Can be set up as a service under Windows. Its integrated web server also enables you to configure the server and perform logfile diagnostics via a browser.

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Linux-based groupware server for email, calendar and messaging functions. Includes an interface to Outlook and also supports email for BlackBerry and Palm Treo devices. Can also be purchased as an Enterprise edition, for which support is provided.

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