Strange e-mail address

[Millzy01]

Hi, I have s strange problem with exchange 5.5, two of my users have e-mail addresses in their exchange mail box, only two people have access to the exchange server and neither me or the other person created these alternate e-mail addresses, has anyone ever had this happen? a virus scan of the machine has not found any viruses.

Thanks

Dave

 

[xmsre]

what is the format of the address?