Do i still need to use X400 email address?

Hi Experts.

In my work, we use exchange 2007 server. Sometimes, I saw X400 email address. Do i still need to create one?
What's the reason behind it? I know the email works without X400.
Who is Participating?
Dave StringfellowIT managerCommented:
You dont need too, Its an old Legacy address used quite a few versions of Exchange ago.
koala-londonAuthor Commented:
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