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−If you still have installed vmm 0.3.x you have to proceed this step first:
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−
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−    * upgrade your vmm installation to version 0.4-r41
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−
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−
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−If you have installed vmm 0.4/0.4-r41 you have to proceed this steps:
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−
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−    * stop Postfix and Dovecot
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−    * backup/dump your database.
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−    * backup/dump your database!
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−    
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−    * start psql and connect to the appropriate database (ex. psql mailsys)
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−    * update the database: \i update_tables_0.4.x-0.5.pgsql
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−    * GRANT SELECT ON postfix_alias TO postfix;
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−                                       ^^^^^^^^ <- your Postfix db user
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−
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−    * execute upgrade.sh
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−
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−    * start Dovecot and Postfix
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−
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−
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−else
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−     * read INSTALL