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Mercury Mail Transport System
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<p>Mercury Mail Transport System (Mercury MTS) is a standards-compliant <a href="/facts/Mail_server/9SJG5sbb">mail server</a> developed by <a href="/facts/David_Harris_(software_developer)/fDt50TWS">David Harris</a>, who also develops the <a href="/facts/Pegasus_Mail/vhQAN1nT">Pegasus Mail</a> client. </p><p>It was <a href="/facts/Freeware/c8oGA9ju">freeware</a> prior to January 2007, but is now <a href="/facts/Donationware/um78Gk98">donationware</a> for non-commercial and personal use, and <a href="/facts/Shareware/TAhIvJXt">shareware</a> for other uses. </p>