Review roundup: 6 free email servers

These free servers boast feature sets nearly as robust as those of their commercial brethren
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For this review we tested six free or open source email server products: Apache James (cross-platform), Citadel (Linux-only), hMailServer (Windows-only), SmarterMail (Windows-only), Zarafa (Linux-only) and Axigen (cross-platform). Most have commercial options, but we specifically limited our testing to the free or community editions. See story version.

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