Email server – redundant, mobile, and secure [duplicate]

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Answer

Avoid “reinventing the wheel”…

It’s possible to obtain high-availability mail through less-complication means.

There are some redundancies already built into the SMTP protocol (retries, MX priority, etc.). You can get much of the same protection by using a backup MX that can spool if your primary delivery system is unavailable.

IMAP does what you’re asking in terms of synchronization. Microsoft Exchange MAPI is a little more elegant.

The path of least resistance (and $cost) is probably obtaining an account on a hosted service, for example, hosted Microsoft Exchange available through any number of cloud providers. Let them handle the redundancy. It doesn’t have to be Microsoft. There are plenty of Linux-based mail hosting solutions available, too.

See:

How to make sure that in case of our mail server being unreachable (connection down) mail still gets queued and resent once it’s back up?

How to build a high availability Postfix system?

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Source : Link , Question Author : Robot , Answer Author : Community

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