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Very good information (working out of the box, just 5 first commands):
http://ubuntuguide.org/wiki/Mail_Server_setup
http://www.blime.com/tag/mail-stack-delivery/
Follow-up information for virtual domains etc:
...
...
Very good information (working out of the box, just 5 first commands):
http://ubuntuguide.org/wiki/Mail_Server_setup
http://www.blime.com/tag/mail-stack-delivery/
Follow-up information for virtual domains etc:
...