Recovery deleted sent folder message

[luis lugo]

Hi,

An
 account of my mail server was used to sent a lot of e-mails by a 
spammer and when the user of this account deleted the emails that 
spammer sent, all of the message that the user have in the sent folder 
disappeared. I don't have backup of the sent folder and I need to know a
 way to recover the deleted messages from the sent folder. Help me with 
this big problem. Thanks.



      
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