Postfix install shows errror

When i try to install postfix using apt-get install postfix; it shows the below error

dpkg: unrecoverable fatal error, aborting:

Kindly let me know how to correct this. Mails is not working in my server.


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The steps to resolve this may be a bit relative to the rest of the error message. I found a more detailed discussion on one of these errors here and it might help: