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The SEPPmail system can support redundant external or internal MTAs by only internally available
dummy domain, configured for the external and the internal MTA. For each dummy domain, MX
records are created with 2 different preferences in the internal DNS. The SEPPmail system forwards
emails as default on to the host with the lowest preference. In case of failure of that host, emails are
automatically sent to the host with the higher preference.
The setting of the host name for the redundant internal and external MTAs, is performed in the »Mail
Sy s tem« menu.
Fi gur e 4 - Schemati c r ep r es entati o n o f the us e o f i nter nal and ex ter nal r ed und ant M TAs
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