RE: Lyris MailEngine Versus Qmail

[Russ Mann]

http://www.lyris.com/products/mailengine/essentials/more_benefits/

Crash-proof option. Makes sure that no message is lost in event of crash or
power failure. Note: this feature slows performance.

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In other words, if you want "Secure, Fast, Reliable", Lyris can't do all of
them at once.