Short form not working

Date: Mon, 13 Jan 2014 07:12:51 -0400
From: John Dennis Elliott <ap721@chebucto.ns.ca>
To: userhelp@chebucto.ns.ca
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When I type an abbreviation in the address section of webmail, the  
full address does not appear.  Eg "john" does not become  
ap721@chebucto.ns.ca
John Elliott

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