about mail server and formats

[Amaury Viera Hernández]

Hi everyone,
I'm using postfix as smtp on my mail server,
I need that :
1- When the users send emails with atachments in .doc formats, the 
mailserver could send this messages with this atachments in .odt too.
2- When the users send emails with atachments in .odt formats, the 
mailserver could send this messages with this atachments in .doc too.
3- When the users receive emails with atachments in .odt formats, the 
mailserver could store this messages with this atachments in .doc too.
4- When the users receive emails with atachments in .doc formats, the 
mailserver could store this messages with this atachments in .odt too.
5- The others combinations between office and opendocument formats(I 
know that office 2010 supports the opendocument format, but i need to 
convert the documents while the users are sending and receiving emails).

Some ideas, tools or ways to do it?

I apologize me for my language, I don't speak english fluentlly,
Regards, Amaury.

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