whats the point of @localhost entries for a mail server

Posted by radman on Server Fault See other posts from Server Fault or by radman
Published on 2010-06-10T03:59:11Z Indexed on 2010/06/10 4:03 UTC
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Hi,

After recently setting up a mail server I am now adding the users that I need. As part of the tutorial I followed I created root@localhost as an account and also a bunch of aliases (postmaster@localhost, webmaster@localhost etc).

What is the point of having al these localhost addresses? it seems that no one can ever mail them directly...

Also I am curious as to what targets I should include on my domain (like postmaster, root, webmaster etc) and what ramifications there might be for doing so?

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